第一種通過中間值

int a = 5;int b = 10;int temp;temp = a;a = b;b = temp;

第二種通過相加

int a = 5;int b = 10;a = a + b;b = a - b;a = a - b;

第三種通過異或

int a = 5;int b = 10;a = a^b;b = a^b;a = a^b;