Do not use a temporary variable exchange values of two variables

Topic: Do not use a temporary variable exchange values ​​of two variables

Analysis: addition, subtraction, multiplication, or that (A ^B A == B), four methods are as follows:

//方法一：利用加法
int Swap3(int *x, int *y)
{
	*x = *x + *y;//*x是二者和
	*y = *x - *y;//*y是*x
	*x = *x - *y;//*x是*y
}
 
//方法二：利用减法
int Swap1(int *x, int *y)
{
	*x = *x - *y;//*x是二者差值
	*y = *x + *y;//*x是*y
	*x = *y - *x;//*y是*x
}
 
//方法三：利用乘法
int Swap4(int *x, int *y)
{
	*x = (*x) * (*y);//*x是二者乘积
	*y = *x / *y;//*y是*x
	*x = *x / *y;//*x是*y
}
 
//方法四：利用除法
int Swap2(int *x, int *y)
{
	*x = *x ^ *y;
	*y = *x ^ *y;
	*x = *x ^ *y;
}
 
//方法五：创建临时变量
int Swap5(int *x, int *y)
{
	int tmp = *x;
	*x = *y;
	*y = tmp;
}