交换变量的值的两种有趣方法(位操作与算术法)

#include<stdio.h>
#include <iostream>

using namespace std;

int main()
{
int a = 29, b = 7;
a = a ^ b;
printf("%d,%d\n", a, b);

b = b ^ a;
a = a ^ b;

printf("%d,%d\n", a, b);

system("pause");
return 0;
}

#include<stdio.h>
#include <iostream>

using namespace std;

int main()
{
int a = 29, b = 7;

a=a+b;
b=a-b;
a=a-b;

printf("%d,%d\n", a, b);

system("pause");
return 0;
}