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c语言，求答案和解释，为啥我参考的答案是选C

2025-04-02 15:58:03

推荐回答（2个）

回答1：

应该不合法的是b吧
x=y==5 ==的优先级高于= 先算后面的，等价于x=(y==5) 是合法的
x=y=5 c语言赋值是从右往左，且赋值的左端只能是一个符号，不能是表达式或常数如x+y=1就不合法
x+=x 等价于x=x+x是合法的
x=y%2.8 2.8是double类型，%右端不能为double类型，是不合法的

回答2：

买到山寨版了吧，b是错的

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