c语言代码（递归）练习21

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int my_strlen(char* n )
{
    int  i = 0;
    while(*n != '\0')
    {
        i++;
        n++;
    }
    return i;
}

//递归函数：大事化小
//my_strlen("ayue");
//1+my_strlen("yue");
//.......
//1+1+1+0
int my_strlen2(char* n)
{
    if (*n != '\0')
    {
        return 1+my_strlen(n+1);
    }
    return 0;
}
int main()
{
    char arr[] = "ayue";
    //int len = strlen(arr);
    //printf("%d", len);
    int len = my_strlen2(arr);
    printf("你输入的字符串长度是:%d", len);
    return 0;
}