C语言交换字符串示例

在C语言中，如何交换字符串？创建一个源文件：program_to_swap_strings.c，参考以下实现代码 -

#include <stdio.h>

int main() {
    char s1[] = "MyDearLe";
    char s2[] = "Dazzling";
    char ch;

    int index = 0;

    //Character by Character approach

    printf("Before Swapping - \n");
    printf("Value of s1 - %s \n", s1);
    printf("Value of s2 - %s \n", s2);

    while (s1[index] != '\0') {
        ch = s1[index];
        s1[index] = s2[index];
        s2[index] = ch;
        index++;
    }

    printf("After Swapping - \n");
    printf("Value of s1 - %s \n", s1);
    printf("Value of s2 - %s \n", s2);

    return 0;
}

执行上面示例代码，得到以下结果 -

Before Swapping -
Value of s1 - MyDearLe
Value of s2 - Dazzling
After Swapping -
Value of s1 - Dazzling
Value of s2 - MyDearLe

注意：上面示例中只是交换两个相同长度的字符数组变量的值。你可根据自己的理解开发更复杂的功能：如两个不同长度的字符串怎么交换？