数组的反序用临时变量
#include<stdio.h>
int main()
{
int arr[7] = { 1, 2, 3, 4, 5, 6, 7 };
int length = 7;for (int i = 0; i < (length >> 1); ++i)
{
//程序中会比较少出现普通常量，来确保后期维护
int temp = arr[i];
arr[i] = arr[length - 1 - i];
arr[length - 1 - i] = temp;
}
for (int i = 0; i < length; ++i)
printf("%d\t",arr[i]);
printf("\n");
getchar();
getchar();
}
运行截图：