编辑代码

#include <stdio.h>

int strlen1(char *s){
    if(*s == '\0')
    return 0;
    else
    return 1+strlen1(s+1);
}
int main () {
    char a[10] = "china";
    int k = 0;
    k = strlen1(a);
    printf("%d",k);
    return 0;
}