C语言交换变量值的几种方法

第一种：使用中间变量

int a = 1, b = 2, c;

c = a;

a = b;

b = c;

printf(“%d,%d”, a, b);

第二种：

int a = 1, b = 2;

a = a + b;

b = a - b;

a = a - b;

printf(“%d%d”, a, b);

或者:

a = a ＊ b;

b = a / b;

a = a / b;

第三种：

int a = 1, b = 2;

a ^= b;

b ^= a;

a ^= b;

printf(“%d,%d”, a, b);

int a = 1, b = 2;

b = (_int64)((_int64) a << 32 | (a = b)) >> 32;

printf(“%d,%d”, a, b);