完整代码在最后
1. 流程图
流程图.png
2.主函数
int main() { //主函数
for (int i = 1; i; i++) {
int n;
printf("*************欢迎使用学生选修课程系统***************\n");
printf("\t *** 菜单 ***\n");
printf("\t**** 1.录入课程信息 ****\n");
printf("\t**** 2.浏览课程信息 ****\n");
printf("\t**** 3.查询课程信息 ****\n");
printf("\t**** 4.录入学生信息 ****\n");
printf("\t**** 5.学生选修课程 ****\n");
printf("\t**** 6.选修课程统计 ****\n");
printf("\t**** 7.退出系统 ****\n");
printf("\t**** 请输入你的选择! ****\n");
scanf("%d", &n);
if (n < 1 || n > 7) {
printf("输入错误");
scanf("%d", &n);
} else if (n >= 1 && n < 7) {
switch (n) {
case 1:
Courseinsert();
break;
case 2:
Coursebrowse();
break;
case 3:
Coursequery();
break;
case 4:
Studentinsert();
break;
case 5:
Studentcourse();
break;
case 6:
Statistic();
break;
}
} else {
break;
}
}
return 0;
}
3.定义变量
3.1定义课程信息结构体和学生信息结构体
学生、课程er图
定义课程信息结构体：
struct CourseInfor { //定义课程信息结构体数组 全局变量
int coursecode; //课程编号
char coursename[20]; //课程名称
char coursetype[20]; //课程性质
int totalhour; //总学时
int classhour; //授课学时
int exercisehour; //上机或实验学时
float credit; //学分
int term; //开课学期
};
学生信息结构体：
struct StudentInfor { //定义学生结构体数组 全局变量
int stucode; //学号
char stuname[20]; //学生姓名
int selectnumber; //选择的课程数量
int selectcode[100]; //选择课程的编号
};
定义课程信息（CourseInfo）结构体数组 数组名字叫course[] 数组大小为100 也就是course[]数组中可以存100门课程
struct CourseInfor courses[100];定义学生信息（StudentInfo）结构体数组 数组名称叫stdus[] 数组大小为100 也就是stdus[]数组中可以存100名学生
struct StudentInfor stus[100];定义课程数量 初始值是0 注：cnt是count的缩写 用作计数器 coursecnt就是course count的缩写 所以coursecnt意思是课程的计数
int coursecnt = 0;定义学生数量 初始值是0 注：cnt是count的缩写 用作计数器 stucnt就是student count的缩写 所以coursecnt意思是学生的计数
int stucnt = 0;
4.各个模块功能函数（增、删、改、查）
4.1 录入课程信息模块 Courseinsert()
void Courseinsert() { //课程信息录入
int i;
int cnt = 0;
printf("请输入录入课程数量：\n");
scanf("%d", &cnt);
coursecnt = cnt;
printf("请输入课程信息（格式如下：1 C语言 编程语言 30 20 10 1 1)：\n");
printf("课程编号 课程名称 课程性质 总学时 授课学时 上机学时 学分 开课学期\n");
for (i = 0; i < cnt; i++) {
scanf("%d", &courses[i].coursecode);
scanf("%s", courses[i].coursename);
scanf("%s", courses[i].coursetype);
scanf("%d", &courses[i].totalhour);
scanf("%d", &courses[i].classhour);
scanf("%d", &courses[i].exercisehour);
scanf("%f", &courses[i].credit);
scanf("%d", &courses[i].term);
}
printf("数据已录入完毕\n");
}
4.2 浏览课程信息模块 Coursebrowse()
void Coursebrowse() { //课程信息浏览
int cnt, i;
printf("请输入想浏览多少门课程：\n");
scanf("%d", &cnt);
if (cnt < 1 || cnt > coursecnt) {
printf("输入数据错误，请重新输入！\n");
Coursebrowse();
}
else {
for (i = 0; i < cnt; i++)
{
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
printf("课程数据已经全部展示!\n");
}
}
4.3 查询课程信息模块 Coursequery()
void Coursequery() { //查询课程信息
printf("8.根据课程性质查询\n");
printf("9.根据学分查询\n");
printf("请输入所要查询编号\n");
int choice;
scanf("%d", &choice);
switch (choice) {
case 8:
char coursetype[20];
printf("请输入课程性质\n");
scanf("%s", coursetype);
for (int i = 0; i < coursecnt; i++) {
if (strcmp(coursetype, courses[i].coursetype) == 0) {
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
}
printf("数据已全部展示\n");
break;
case 9:
float credit;
printf("请输入所要查询的课程学分\n");
scanf("%f", &credit);
for (int i = 0; i < coursecnt; i++) {
if (credit == courses[i].credit)
{
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
}
printf("数据已经全部展示\n");
break;
default:
printf("输入选项错误，请重新输入！\n");
Coursequery();
}
}
4.4 录入学生信息模块 Studentinsert()
void Studentinsert() { //学生信息录入
int cnt;
printf("请输入录入几个学生的信息\n");
scanf("%d", &cnt);
stucnt = cnt;
printf("请输入学生信息(请如以下格式:2207820235 张三\n");
printf("学号 学生姓名\n");
for (int i = 0; i < cnt; i++) {
scanf("%d", &stus[i].stucode);
scanf("%s", stus[i].stuname);
}
printf("学生信息已经录入完毕\n");
}
4.5 学生选课功能模块 Studentcourse()
Studentcourse()选课模块也是用swich分支结构，调用Select1()、 Select2() 、Select3()子函数完成查询可选课程 、选择课程 、查询已选课程 的功能。
4.5.1 Studentcourse()选课函数
void Studentcourse() { //学生选课
int choice;
printf("10.查询可选课程\n");
printf("11.选择课程\n");
printf("12.查询已选课程\n");
printf("请输入你的操作编号\n");
scanf("%d", &choice);
switch (choice)
{
case 10:
{
Select1();
break;
}
case 11:
{
Select2();
break;
}
case 12:
{
Select3();
break;
}
default :
{
printf("输入操作编号错误!\n");
}
}
}
4.5.2 Studentcourse()选课函数的子函数：
Select1()查询可选课程:
void Select1() { //展示可选课程信息
for (int i = 0; i < coursecnt; i++) {
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
printf("课程数据已全部展示!\n");
}
Select2() 选择课程函数:
- Select2()选择课程函数解析：
输入学号，调用judge()函数判断输入学号正确以后 ，用switch分支结构调用Selectcode(studentcode) 、 Selectname(studentcode)、 Selectype(studentcode)、 Selectype(studentcode)、 Selectctime(studentcode)、 Selectcredit(studentcode) 、 Selectterm(studentcode)函数，实现了根据课程编号、课程名称、课程性质、课程总学时、课程授课学时、课程上机学时、课程开设学期选课的功能。
void Select2() { //学生选课
int studentcode;
printf("请输入学生学号!\n");
scanf("%d", &studentcode);
if (judge1(studentcode))
{
printf("不存在此学生信息，请先录入学生信息!\n");
}
else
{
int choice;
printf("13.根据课程编号选择\n");
printf("14.根据课程名称选择\n");
printf("15.根据课程性质选择\n");
printf("16.根据课程总学时选择\n");
printf("17.根据课程授课学时选择\n");
printf("18.根据课程上机学时选择\n");
printf("19.根据课程学分选择\n");
printf("20.根据课程开设学期选择\n");
printf("请输入操作编号！\n");
scanf("%d", &choice);
switch (choice)
{
case 13 :
Selectcode(studentcode);
break;
case 14:
Selectname(studentcode);
break;
case 15:
Selectype(studentcode);
break;
case 16:
Selecttime(studentcode);
break;
case 17:
Selectctime(studentcode);
break;
case 18:
Selectetime(studentcode);
break;
case 19:
Selectcredit(studentcode);
break;
case 20:
Selectterm(studentcode);
break;
}
}
}
-
Select2() 的子函数——judge()函数
judge1(int studentcode) 是学号判断函数 ；studentcode是学号 这个函数意思就是用for循环遍历整个学生数组stdus[]，如果输入的学号与学生信息数组中第i个学生stdus[i]的学号匹配 就说明输入的学号真实存在 就返回0 否则返回1
int judge1(int studentcode) {
int x = 1;
for (int i = 0; i < stucnt; i++) { //
if (studentcode == stus[i].stucode) //如果学生数组与输入的学号studentcode相匹配
x = 0; //就说明输入的学号正确 那么就让x=0
}
return x; //返回0 就说明学号输入正确 反之如果返回1 就说明输入的学号错误 查无此学号
}
judge2(int selectcode) 是课程编号判断函数 selectcode是要选课的课程编号 这个函数意思就是用for循环遍历整个课程数组course[] 如果课程数组中第i个课程course[i]的课程编号与输入的课程编号studentcode相匹配 就说明输入的课程编号真实存在 课程编号输入正确 那么就让x=0 就返回0 否则返回1
int judge2(int selectcode) { //判断函数；selectcode是要选课的课程编号 这个函数意思就是如果输入的课程编号与课程信息信息数组course[]中已存储课程编号相匹配 就返回0 否则返回1
int x = 1;
for (int i = 0; i < coursecnt; i++) { //用for循环遍历整个课程数组course[]
if (selectcode == courses[i].coursecode) //如果课程数组中第i个课程course[i]的课程编号与输入的课程编号studentcode相匹配
x = 0; //就说明输入的课程编号真实存在 课程编号输入正确 那么就让x=0
}
return x;
}
余下判断函数同理
-
Select2() 的子函数——选课模块函数
1.通过课程编号选课Selectcode()
void Selectcode(int studentcode) {
for (int k = 0; k < stucnt; k++)
{
if (studentcode == stus[k].stucode)
{
selectcode2(k);
}
}
}
void selectcode2(int k) { //通过课程编号选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectcode, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的编号!\n");
scanf("%d", &selectcode);
if (judge2(selectcode)) {
printf("输入课程编号错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++) {
if (selectcode == courses[m].coursecode)
s = m; //s是输入的选择课程在courses数组中的序号
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
2.通过课程名称选课 selectname()
void Selectname(int studentcode) {
for (int k = 0; k < stucnt; k++)
{
if (studentcode == stus[k].stucode)
{
selectname2(k);
}
}
}
void selectname2(int k) { //通过课程名称选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int count, a = 2;
char selectname[20];
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入您要选择课程的名称!\n");
scanf("%s", selectname);
for (int i = 0; i < coursecnt; i++) {
if (strcmp(selectname, courses[i].coursename) == 0) //如果输入课程名称和第i个课程名相同
a = 1;
}
if (a == 1)
{
for (int m = 0; m < coursecnt; m++)
{
if (strcmp(selectname, courses[m].coursename) == 0)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
else if (a == 2) {
printf("输入课程名称错误，请重新输入!\n");
}
if (count > 1)
t++;
a = 2;
}
else
printf("选课失败，请按要求进行选课!\n");
}
3.通过课程性质选课Selectype()
void Selectype(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selecttype2(k);
}
}
}
void selecttype2(int k) { //通过课程性质选课
int t = 0, s, a = 2;
char selecttype[20];
int count;
printf("请问想要选择几门课程?\n");
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的课程性质!\n");
scanf("%s", selecttype);
for (int i = 0; i < coursecnt; i++)
{
if (strcmp(selecttype, courses[i].coursetype) == 0)
a = 1;
}
if (a == 1)
{
for (int m = 0; m < coursecnt; m++)
{
if (strcmp(selecttype, courses[m].coursetype) == 0)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
else if (a == 2)
{
printf("输入课程性质错误，请重新输入!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
4.通过课程总学时选课 Selecttime()
void Selecttime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selecttime2(k);
}
}
}
void selecttime2(int k) { //通过课程总学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selecttime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的总学时!\n");
scanf("%d", &selecttime);
if (judge3(selecttime)) {
printf("输入课程总学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++) {
if (selecttime == courses[m].totalhour)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
5.通过课程授课学时选课 selectctime()
void Selectctime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectctime2(k);
}
}
}
void selectctime2(int k) { //通过课程授课学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectctime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的授课学时!\n");
scanf("%d", &selectctime);
if (judge4(selectctime)) {
printf("输入课程授课学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectctime == courses[m].classhour)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
6.通过课程上机或实验学时选课selectetime()
void Selectetime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectetime2(k);
}
}
}
void selectetime2(int k) { //通过课程上机或实验学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectetime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的上机学时!\n");
scanf("%d", &selectetime);
if (judge5(selectetime)) {
printf("输入课程上机学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectetime == courses[m].coursecode)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
7.通过课程学分选课 selectcredit()
void Selectcredit(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectcredit2(k);
}
}
}
void selectcredit2(int k) { //通过课程学分选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectcredit, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的学分!\n");
scanf("%d", &selectcredit);
if (judge6(selectcredit)) {
printf("输入课程学分错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectcredit == courses[m].credit)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
8,通过课程开课学期选课 selectterm()
void Selectterm(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectterm2(k);
}
}
}
void selectterm2(int k) { //通过课程开课学期选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectterm, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的开课学期!\n");
scanf("%d", &selectterm);
if (judge7(selectterm)) {
printf("输入课程开课学期错误，请重新输入!\n");
}
else
{
for (int m = 0; m < coursecnt; m++)
{
if (selectterm == courses[m].term)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
Select3() 查询已选课程:
void Select3() {
int studentcode;
printf("请输入想要查询学生的学号!\n");
scanf("%d", &studentcode);
if (judge1(studentcode))
printf("无此学生信息，请先录入信息!\n");
else {
query(studentcode);
}
}
4.6 选修课程统计模块 Statistic()
Statistic() 用switch分支结构调用了子函数 Statistic1() Statistic2() Statistic3() Statistic4()实现统计功能：
void Statistic() { //统计
printf("21.统计学生选了多少门课程\n");
printf("22.统计课程的选择人数\n");
printf("23.统计选择某门课程的学生信息\n");
int choice;
printf("请输入你的选择!\n");
scanf("%d", &choice);
switch (choice)
{
case 21:
Statistic1();
break;
case 22:
Statistic3();
break;
case 23:
Statistic4();
break;
}
}
子函数 Statistic1() Statistic2() Statistic3() Statistic4()如下：
void Statistic1() { //统计学生选课数量
printf("请输入想要查询学生的学号!\n");
int stucode;
scanf("%d", &stucode);
for (int i = 0; i < stucnt; i++) {
if (stucode == stus[i].stucode)
{
printf("该学生一共选择的课程数量:");
printf("%d\n", stus[i].selectnumber);
}
}
}
int Statistic2(int coursecode) {
int acount = 0;
for (int i = 0; i < stucnt; i++) {
for (int k = 0; k < stucnt; k++) {
if (coursecode == stus[i].selectcode[k])
acount++;
}
}
return acount;
}
void Statistic3() { //统计选择某门课程的人数
int coursecode, count = 0;
printf("请输入你想要查询课程的编号!\n");
scanf("%d", &coursecode);
count = Statistic2(coursecode);
for (int i = 0; i < coursecnt; i++) {
if (coursecode == courses[i].coursecode) {
printf("选择该课程的人数:");
printf("%d\n", count);
}
}
}
void Statistic4() {
}
4.7 退出系统
附录 完整代码
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct CourseInfor { //定义课程信息结构体数组 全局变量
int coursecode; //课程编号
char coursename[20]; //课程名称
char coursetype[20]; //课程性质
int totalhour; //总学时
int classhour; //授课学时
int exercisehour; //上机或实验学时
float credit; //学分
int term; //开课学期
};
struct StudentInfor { //定义学生结构体数组 全局变量
int stucode; //学号
char stuname[20]; //学生姓名
int selectnumber; //选择的课程数量
int selectcode[100]; //选择课程的编号
};
struct CourseInfor courses[100]; //定义了课程信息（CourseInfo）结构体数组 数组名字叫course[] 数组大小为100 也就是course[]数组中可以存100门课程
struct StudentInfor stus[100]; //定义了学生信息（StudentInfo）结构体数组 数组名称叫stdus[] 数组大小为100 也就是stdus[]数组中可以存100门课程
int coursecnt = 0; //课程数量 注：cnt是count的缩写 用作计数器 coursecnt就是course count的缩写 所以coursecnt意思是课程的计数
int stucnt = 0; //学生数量 注：cnt是count的缩写 用作计数器 stucnt就是student count的缩写 所以coursecnt意思是学生的计数
int judge1(int studentcode) { //判断函数 ；studentcode是学号 这个函数意思就是如果输入的学号与学生信息数组stdus[]中的学生的学号匹配 就返回0 否则返回1
int x = 1;
for (int i = 0; i < stucnt; i++) { //用for循环遍历整个学生数组stdus[]
if (studentcode == stus[i].stucode) //如果学生数组中第i个学生stdus[i]的学号与输入的学号studentcode相匹配
x = 0; //就说明输入的学号正确 那么就让x=0
}
return x; //返回0 就说明学号输入正确 反之如果返回1 就说明输入的学号错误 查无此学号
}
int judge2(int selectcode) { //判断函数；selectcode是要选课的课程编号 这个函数意思就是如果输入的课程编号与课程信息信息数组course[]中已存储课程编号相匹配 就返回0 否则返回1
int x = 1;
for (int i = 0; i < coursecnt; i++) { //用for循环遍历整个课程数组course[]
if (selectcode == courses[i].coursecode) //如果课程数组中第i个课程course[i]的课程编号与输入的课程编号studentcode相匹配
x = 0; //就说明输入的课程编号真实存在 课程编号输入正确 那么就让x=0
}
return x;
}
int judge3(int selecttime) { //判断函数
int x = 1;
for (int i = 0; i < coursecnt; i++) {
if (selecttime == courses[i].totalhour)
x = 0;
}
return x;
}
int judge4(int selectctime) { //判断函数
int x = 1;
for (int i = 0; i < coursecnt; i++) {
if (selectctime == courses[i].classhour)
x = 0;
}
return x;
}
int judge5(int selectetime) { //判断函数
int x = 1;
for (int i = 0; i < coursecnt; i++) {
if (selectetime == courses[i].exercisehour)
x = 0;
}
return x;
}
int judge6(int selectcredit) { //判断函数
int x = 1;
for (int i = 0; i < coursecnt; i++) {
if (selectcredit == courses[i].credit)
x = 0;
}
return x;
}
int judge7(int selectterm) { //判断函数
int x = 1;
for (int i = 0; i < coursecnt; i++) {
if (selectterm == courses[i].term)
x = 0;
}
return x;
}
void selectcode2(int k) { //通过课程编号选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectcode, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的编号!\n");
scanf("%d", &selectcode);
if (judge2(selectcode)) {
printf("输入课程编号错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++) {
if (selectcode == courses[m].coursecode)
s = m; //s是输入的选择课程在courses数组中的序号
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selectname2(int k) { //通过课程名称选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int count, a = 2;
char selectname[20];
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入您要选择课程的名称!\n");
scanf("%s", selectname);
for (int i = 0; i < coursecnt; i++) {
if (strcmp(selectname, courses[i].coursename) == 0) //如果输入课程名称和第i个课程名相同
a = 1;
}
if (a == 1)
{
for (int m = 0; m < coursecnt; m++)
{
if (strcmp(selectname, courses[m].coursename) == 0)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
else if (a == 2) {
printf("输入课程名称错误，请重新输入!\n");
}
if (count > 1)
t++;
a = 2;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selecttype2(int k) { //通过课程性质选课
int t = 0, s, a = 2;
char selecttype[20];
int count;
printf("请问想要选择几门课程?\n");
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的课程性质!\n");
scanf("%s", selecttype);
for (int i = 0; i < coursecnt; i++)
{
if (strcmp(selecttype, courses[i].coursetype) == 0)
a = 1;
}
if (a == 1)
{
for (int m = 0; m < coursecnt; m++)
{
if (strcmp(selecttype, courses[m].coursetype) == 0)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
else if (a == 2)
{
printf("输入课程性质错误，请重新输入!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selecttime2(int k) { //通过课程总学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selecttime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的总学时!\n");
scanf("%d", &selecttime);
if (judge3(selecttime)) {
printf("输入课程总学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++) {
if (selecttime == courses[m].totalhour)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selectctime2(int k) { //通过课程授课学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectctime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的授课学时!\n");
scanf("%d", &selectctime);
if (judge4(selectctime)) {
printf("输入课程授课学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectctime == courses[m].classhour)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selectetime2(int k) { //通过课程上机或实验学时选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectetime, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的上机学时!\n");
scanf("%d", &selectetime);
if (judge5(selectetime)) {
printf("输入课程上机学时错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectetime == courses[m].coursecode)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selectcredit2(int k) { //通过课程学分选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectcredit, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++) {
printf("请输入你要选择课程的学分!\n");
scanf("%d", &selectcredit);
if (judge6(selectcredit)) {
printf("输入课程学分错误，请重新输入!\n");
}
else {
for (int m = 0; m < coursecnt; m++)
{
if (selectcredit == courses[m].credit)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void selectterm2(int k) { //通过课程开课学期选课
int t = 0, s;
printf("请问想要选择几门课程?\n");
int selectterm, count;
scanf("%d", &count);
if (count < 1)
printf("选课失败,请按照要求进行选课!\n");
else if (count >= 1 && count <= coursecnt)
for (int i = 0; i < count; i++)
{
printf("请输入你要选择课程的开课学期!\n");
scanf("%d", &selectterm);
if (judge7(selectterm)) {
printf("输入课程开课学期错误，请重新输入!\n");
}
else
{
for (int m = 0; m < coursecnt; m++)
{
if (selectterm == courses[m].term)
s = m;
}
stus[k].selectcode[t] = courses[s].coursecode;
stus[k].selectnumber++;
printf("选课成功!\n");
}
if (count > 1)
t++;
}
else
printf("选课失败，请按要求进行选课!\n");
}
void Courseinsert() { //课程信息录入
int i;
int cnt = 0;
printf("请输入录入课程数量：\n");
scanf("%d", &cnt);
coursecnt = cnt;
printf("请输入课程信息（格式如下：1 C语言 编程语言 30 20 10 1 1)：\n");
printf("课程编号 课程名称 课程性质 总学时 授课学时 上机学时 学分 开课学期\n");
for (i = 0; i < cnt; i++) {
scanf("%d", &courses[i].coursecode);
scanf("%s", courses[i].coursename);
scanf("%s", courses[i].coursetype);
scanf("%d", &courses[i].totalhour);
scanf("%d", &courses[i].classhour);
scanf("%d", &courses[i].exercisehour);
scanf("%f", &courses[i].credit);
scanf("%d", &courses[i].term);
}
printf("数据已录入完毕\n");
}
void Coursebrowse() { //课程信息浏览
int cnt, i;
printf("请输入想浏览多少门课程：\n");
scanf("%d", &cnt);
if (cnt < 1 || cnt > coursecnt) {
printf("输入数据错误，请重新输入！\n");
Coursebrowse();
}
else {
for (i = 0; i < cnt; i++)
{
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
printf("课程数据已经全部展示!\n");
}
}
void Coursequery() { //查询课程信息
printf("8.根据课程性质查询\n");
printf("9.根据学分查询\n");
printf("请输入所要查询编号\n");
int choice;
scanf("%d", &choice);
switch (choice) {
case 8:
char coursetype[20];
printf("请输入课程性质\n");
scanf("%s", coursetype);
for (int i = 0; i < coursecnt; i++) {
if (strcmp(coursetype, courses[i].coursetype) == 0) {
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
}
printf("数据已全部展示\n");
break;
case 9:
float credit;
printf("请输入所要查询的课程学分\n");
scanf("%f", &credit);
for (int i = 0; i < coursecnt; i++) {
if (credit == courses[i].credit)
{
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
}
printf("数据已经全部展示\n");
break;
default:
printf("输入选项错误，请重新输入！\n");
Coursequery();
}
}
void Studentinsert() { //学生信息录入
int cnt;
printf("请输入录入几个学生的信息\n");
scanf("%d", &cnt);
stucnt = cnt;
printf("请输入学生信息(请如以下格式:2207820235 张三\n");
printf("学号 学生姓名\n");
for (int i = 0; i < cnt; i++) {
scanf("%d", &stus[i].stucode);
scanf("%s", stus[i].stuname);
}
printf("学生信息已经录入完毕\n");
}
void Selectcode(int studentcode) {
for (int k = 0; k < stucnt; k++)
{
if (studentcode == stus[k].stucode)
{
selectcode2(k);
}
}
}
void Selectname(int studentcode) {
for (int k = 0; k < stucnt; k++)
{
if (studentcode == stus[k].stucode)
{
selectname2(k);
}
}
}
void Selectype(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selecttype2(k);
}
}
}
void Selecttime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selecttime2(k);
}
}
}
void Selectctime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectctime2(k);
}
}
}
void Selectetime(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectetime2(k);
}
}
}
void Selectcredit(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectcredit2(k);
}
}
}
void Selectterm(int studentcode) {
for (int k = 0; k < stucnt; k++) {
if (studentcode == stus[k].stucode) {
selectterm2(k);
}
}
}
void query(int studentcode) { //查询已选课程信息
for (int i = 0; i < stucnt; i++) {
if (studentcode == stus[i].stucode) {
printf("姓名:%s\n", stus[i].stuname);
printf("学号:%d\n", stus[i].stucode);
printf("选择课程的编号:");
for (int j = 0; j < coursecnt; j++) {
printf("%3d", stus[i].selectcode[j]);
}
printf("\n");
}
}
}
void Select1() { //展示可选课程信息
for (int i = 0; i < coursecnt; i++) {
printf("%d %s %s %d %d %d %f %d\n",
courses[i].coursecode,
courses[i].coursename,
courses[i].coursetype,
courses[i].totalhour,
courses[i].classhour,
courses[i].exercisehour,
courses[i].credit,
courses[i].term);
}
printf("课程数据已全部展示!\n");
}
void Select2() { //学生选课
int studentcode;
printf("请输入学生学号!\n");
scanf("%d", &studentcode);
if (judge1(studentcode))
{
printf("不存在此学生信息，请先录入学生信息!\n");
}
else
{
int choice;
printf("13.根据课程编号选择\n");
printf("14.根据课程名称选择\n");
printf("15.根据课程性质选择\n");
printf("16.根据课程总学时选择\n");
printf("17.根据课程授课学时选择\n");
printf("18.根据课程上机学时选择\n");
printf("19.根据课程学分选择\n");
printf("20.根据课程开设学期选择\n");
printf("请输入操作编号！\n");
scanf("%d", &choice);
switch (choice)
{
case 13 :
Selectcode(studentcode);
break;
case 14:
Selectname(studentcode);
break;
case 15:
Selectype(studentcode);
break;
case 16:
Selecttime(studentcode);
break;
case 17:
Selectctime(studentcode);
break;
case 18:
Selectetime(studentcode);
break;
case 19:
Selectcredit(studentcode);
break;
case 20:
Selectterm(studentcode);
break;
}
}
}
void Select3() {
int studentcode;
printf("请输入想要查询学生的学号!\n");
scanf("%d", &studentcode);
if (judge1(studentcode))
printf("无此学生信息，请先录入信息!\n");
else {
query(studentcode);
}
}
void Studentcourse() { //学生选课
int choice;
printf("10.查询可选课程\n");
printf("11.选择课程\n");
printf("12.查询已选课程\n");
printf("请输入你的操作编号\n");
scanf("%d", &choice);
switch (choice)
{
case 10:
{
Select1();
break;
}
case 11:
{
Select2();
break;
}
case 12:
{
Select3();
break;
}
default :
{
printf("输入操作编号错误!\n");
}
}
}
void Statistic1() { //统计学生选课数量
printf("请输入想要查询学生的学号!\n");
int stucode;
scanf("%d", &stucode);
for (int i = 0; i < stucnt; i++) {
if (stucode == stus[i].stucode)
{
printf("该学生一共选择的课程数量:");
printf("%d\n", stus[i].selectnumber);
}
}
}
int Statistic2(int coursecode) {
int acount = 0;
for (int i = 0; i < stucnt; i++) {
for (int k = 0; k < stucnt; k++) {
if (coursecode == stus[i].selectcode[k])
acount++;
}
}
return acount;
}
void Statistic3() { //统计选择某门课程的人数
int coursecode, count = 0;
printf("请输入你想要查询课程的编号!\n");
scanf("%d", &coursecode);
count = Statistic2(coursecode);
for (int i = 0; i < coursecnt; i++) {
if (coursecode == courses[i].coursecode) {
printf("选择该课程的人数:");
printf("%d\n", count);
}
}
}
void Statistic4() {
}
void Statistic() { //统计
printf("21.统计学生选了多少门课程\n");
printf("22.统计课程的选择人数\n");
printf("23.统计选择某门课程的学生信息\n");
int choice;
printf("请输入你的选择!\n");
scanf("%d", &choice);
switch (choice)
{
case 21:
Statistic1();
break;
case 22:
Statistic3();
break;
case 23:
Statistic4();
break;
}
}
int main() { //主函数
for (int i = 1; i; i++) {
int n;
printf("*************欢迎使用学生选修课程系统***************\n");
printf("\t *** 菜单 ***\n");
printf("\t**** 1.录入课程信息 ****\n");
printf("\t**** 2.浏览课程信息 ****\n");
printf("\t**** 3.查询课程信息 ****\n");
printf("\t**** 4.录入学生信息 ****\n");
printf("\t**** 5.学生选修课程 ****\n");
printf("\t**** 6.选修课程统计 ****\n");
printf("\t**** 7.退出系统 ****\n");
printf("\t**** 请输入你的选择! ****\n");
scanf("%d", &n);
if (n < 1 || n > 7) {
printf("输入错误");
scanf("%d", &n);
} else if (n >= 1 && n < 7) {
switch (n) {
case 1:
Courseinsert();
break;
case 2:
Coursebrowse();
break;
case 3:
Coursequery();
break;
case 4:
Studentinsert();
break;
case 5:
Studentcourse();
break;
case 6:
Statistic();
break;
}
} else {
break;
}
}
return 0;
}
