c++ 编译错误:ISO C++ 禁止指针和整数之间的比较
我正在尝试 Bjarne Stroustrup 的 C++ 书籍第三版中的一个示例.在实现一个相当简单的函数时，我得到以下编译时错误:
I am trying an example from Bjarne Stroustrup's C++ book, third edition. While implementing a rather simple function, I get the following compile time error:
error: ISO C++ forbids comparison between pointer and integer
可能是什么原因造成的?这是代码.错误在 if 行:
What could be causing this? Here is the code. The error is in the if line:
#include <iostream>
#include <string>
using namespace std;
bool accept()
{
cout << "Do you want to proceed (y or n)?
";
char answer;
cin >> answer;
if (answer == "y") return true;
return false;
}
谢谢！
推荐答案
您有两种方法可以解决此问题.首选方法是使用:
You have two ways to fix this. The preferred way is to use:
string answer;
(而不是 char).另一种可能的修复方法是:
(instead of char). The other possible way to fix it is:
if (answer == 'y') ...
(注意单引号而不是双引号，代表一个 char 常量).
(note single quotes instead of double, representing a char constant).
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