C語言交換變量值的幾種方法

第一種：使用中間變量

int a = 1, b = 2, c;

 

c = a;

a = b;

b = c;

printf(“%d,%d”, a, b);

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第二種：

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;

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第三種：

int a = 1, b = 2;

a ^= b;

b ^= a;

a ^= b;

printf(“%d,%d”, a, b);

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int a = 1, b = 2;

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

printf(“%d,%d”, a, b);