//定义一个数组
int arr[] = {1,2,3,4,5,6};
//取出角标1的值赋给temp
int temp = arr[1];
//把角标0的值赋给角标1
arr[1] = arr[0];
//把存起来的值赋值给角标0
arr[0] = temp;
//定义一个数组
int arr[] = {1,2,3,4,5,6};
//取出角标1的值赋给temp
int temp = arr[1];
//把角标0的值赋给角标1
arr[1] = arr[0];
//把存起来的值赋值给角标0
arr[0] = temp;