编辑代码

#include <stdio.h>
#include<string.h>
/*int main () {
   char line[]="Hello World";//空格也是字节
    printf("strlen=%lu\n",strlen(line));
   printf("sizeof=%lu\n",sizeof(line));
    return 0;
}  */
//替换strlen函数
int mylen(const char*s)
{
    int idx=0;
    int cnt=0;
    while(s[idx]!='\0'){
        idx++;
        cnt++;
    }return cnt;
}
int main(int argc,char const *argv[]){
    char line[]="Hello World";
    printf("strlen=%lu\n",mylen(line));
    printf("sizeof=%lu\n",sizeof(line));
    return 0;
}