编译时错误为 'lvalue required' 但不确定原因

Question

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已关闭 3 年前。

此代码引发左值所需的编译时错误。

#include <stdio.h>

void main()
{
    int k = 8;
    int m = 7;
    k < m ? k++ : m = k;
    printf("%d", k);
}

Answer 1

三元运算符的优先级高于赋值，这就是为什么您的代码等于 (k < m ? k++ : m) = k; 。您的编译器表示括号中的值不可分配。

你想做的是:

#include <stdio.h>

void main()
{
    int k = 8;
    int m = 7;
    k < m ? k++ : (m = k);
    printf("%d", k);
}