赋值运算
int a, b, temp;
a = 10;
b = 5;
temp = a;
a = b;
b = temp;
算数运算
思路一
int a, b;
a = 10;
b = 2;
a = b - a;//a=-8,b=10
b = b - a;//a=-8,b=10
a = b + a;//a=2,b=10 交换成功
思路二
int a = 3, b = 5;
a = a + b; //a = 3 + 5
b = a - b; //b = 8 - 5
a = a - b; //a = 8 - 3
思路三
int a = 3, b = 5;
a = a * b; //a = 3 * 5;
b = a / b; //b = 15 / 3;
a = a / b; //a = 15 / 5;
位运算
int a, b;
a = 20; b = 2;
a = a ^ b;//a=10100,b=0010,两者相异或的结果是10110,并保存在a中。
b = a ^ b;//a=10110,b=0010,两者相异或的结果是10100,并保存在b中,换成二进制是20
a = a ^ b;//a=10110,b=10100,两者相异或的结果是00010,保存在a中,换成十进制是2