前几天刚开始学习C语言，我试着从<string.h>库中创建一个类似strcpy的字符串复制函数，但是它的输出出乎意料。
这是密码

#include <stdio.h>

int stringLen(char *l) {
    int len = 0;
    while (*l != '\0') {
        l++;
        len++;
    }
    return len;
}

int main() {
    char name1[] = "Rohit";
    char name2[] = "Elijah";
    int lenOf_target = stringLen(name2);
    printf("The len of name2 is: %d\n", lenOf_target);
    copyString(name1, name2, lenOf_target);
    printf("The target name1 is 'Rohit' now %s\n", name1);
    printf("The name2(source) still is %s and the length is %d\n",
           name2, stringLen(name2));
}

以下是输出

The len of name2 is: 6
The target name1 is 'Rohit' now Elijah
The name2(source) still is  and the length is 0