include <stdio.h>
include <stdlib.h>
include <string.h>
/Kmp匹配算法，根据自己的理解所写，可能有待改进; 2018/5/28/
/发现在运行窗口中复制粘贴是一件很麻烦的事情;/
void table_date(char a[],int array[10])
{
int k=0,i=0,j=0,cur = 0;
int length = strlen(a);
for(k=2;k<=length;k++)
{
for(i=1;i<k;i++)
{
for(j=0;j<i;j++)
{
if(a[j] != a[k-i+j]) //k = length - i +j
break;
}
if(i == j)cur = j;
}
array[k-1] = cur;
cur = 0;
}
array[0] = 0;
}
int main()
{
char target_string[1000]; //用于存储目标字符串
char match_string[1000]; //用于存储匹配字符串
int length_target,lenght_match,counter=0;//counter计算匹配个数
int integer_table[100],i=0,k=0;
printf("please input target strings:");
gets(target_string);
printf("please input match strings:");
gets(match_string);
table_date(target_string,integer_table);
length_target = strlen(target_string); //匹配字符串长度
lenght_match = strlen(match_string); //目标字符串长度
for(i=0;i<length_target;i++)
{
while(k<lenght_match)
{
if(target_string[i+k]==match_string[k])k++;
else
{
i+=k-integer_table[k];
break;
}
}
if(k==lenght_match)
counter++; //此处的分号用‘;’用‘,’也正确;
i+=lenght_match-1;
k=0;
}
printf("This match string is appearance %d times;",counter);
return 0;
}
