05-02、typedef——typedef与宏定义区别

#include <stdio.h>

typedef int myInt;
#define Integer int

typedef char * String;
#define MY_STRING char *
// 一般情况下如果要给数据类型起一个名称建议用typedef, 不要用define
int main(int argc, const char * argv[]) {
/*
int num = 10;
printf("num = %i\n", num);

myInt age = 30;
printf("age = %i\n", age);

Integer score = 99;
printf("score = %i\n", score);
 */
/*
char *name = "lnj";
printf("name = %s\n", name);

String name2 = "lmj";
printf("name2 = %s\n", name2);

MY_STRING name3 = "lk";
printf("name3 = %s\n", name3);
 */

String name1, name2;
name1 = "lnj";
name2 = "lmj";
printf("name1 = %s, name2 = %s\n", name1, name2);

//    char *name3, name4; // char *name3; char name4;
MY_STRING name3, name4;
name3 = "lk";
name4 = "xb";
printf("name3 = %s, name4 = %s\n", name3, name4);
return 0;
}