c语言题：a+=a—=a×=a a原来为12 求运算后的值

Question

如题所述

Answer 1

a+=a-=a*=a;
<=>(等价)
a += a -= a *= a;

*= ,-=,+=运算优先级别相等;
根据右向作结合的原则,运算顺序为:
a *= a;
a = 144;
a -= a;
a = 0;
a += a;
a = 0;

看出最后为0;