数组的反序

#include<stdio.h>

int main()

{

        char arr[Num];
printf("请输入一个字符串：\n");
gets(arr);
/*printf("%s\n",arr);*/
char *p = NULL;
p = arr;
for (int i = 0; i < (signed)strlen(arr); i++)
{
/*printf("%c\t",*p++);*/
*p = *p + *(p + (signed)strlen(arr) - 1);
*(p + (signed)strlen(arr) - 1) = *p - *(p + (signed)strlen(arr) - 1);
*p = *p - *(p + (signed)strlen(arr) - 1);

}
printf("\n");


for (int i = 0; i < (signed)strlen(arr); i++)
{
printf("%c",*(p+i));
}

retrun 0;

}

运行截图：