C函数交换字符串
以下是交换字符串的示例。
示例
#include<stdio.h>
#include <string.h>
int main() {
char st1[] = "My 1st string";
char st2[] = "My 2nd string";
char swap;
int i = 0;
while(st1[i] != '\0') {
swap = st1[i];
st1[i] = st2[i];
st2[i] = swap;
i++;
}
printf("After swapping s1 : %s\n", st1);
printf("After swapping s2 : %s\n", st2);
return 0;
}输出结果
After swapping s1 : My 2nd string After swapping s2 : My 1st string
在上面的程序中，声明了两个char类型为st1和st2的数组，一个char变量'swap'和一个整数变量i。在循环检查st1是否不为null时，交换st1和st2的值。
char st1[] = "My 1st string";
char st2[] = "My 2nd string";
char swap;
int i = 0;
while(st1[i] != '\0') {
swap = st1[i];
st1[i] = st2[i];
st2[i] = swap;
i++;
}