c语言之利用函数实现字符串的复制

#include<stdio.h>
#include<iostream>

void copy_string(char str1[], char str2[]) {
    int i = 0;
    while (str1[i] != '\0') {
        str2[i] = str1[i];
        i++;
    }
    str2[i] = '\0';
}

int main() {
    char str1[] = "hello world";
    char str2[30];
    copy_string(str1, str2);
    printf("%s\n",str2);
    system("pause");
    return 0;
}

#include<stdio.h>
#include<iostream>

void copy_string2(char* p1, char* p2) {
    for (; *p1 != '\0'; *p1++,*p2++)
    {
        *p2 = *p1;
    }
    *p2 = '\0';
}

int main() {
    char* str1 = (char*) "hello world";
    char str2[] = "i am a student";
    copy_string2(str1, str2);
    printf("%s\n",str2);
    system("pause");
    return 0;
}