C++ “numeric_limits”未在此范围内声明，没有用于调用“max()”的匹配函数
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4798936/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
‘numeric_limits’ was not declared in this scope, no matching function for call to ‘max()’
提问by Matt Munson
I compiled this code at home on my mac w/ xcode and there was no provblem. I compile it at school with g++ on linux and I get these errors:
我在家里用我的 mac w/xcode 编译了这段代码，没有任何问题。我在学校用 g++ 在 linux 上编译它，我得到这些错误：
:‘numeric_limits' is not a member of std
:expected primary-expression before ‘>' token
:no matching function for call to ‘max()'
：'numeric_limits' 不是 std 的成员
：在 '>' 标记之前预期的主表达式
：没有用于调用 'max()' 的匹配函数
#include <iostream>
#include <cstdlib>
using namespace std;
int GetIntegerInput(int lower, int upper)
{
int integer = -1;
do
{
cin >> integer;
cin.clear();
cin.ignore(std::numeric_limits<streamsize>::max(), '\n'); //errors here
}while (integer < lower || integer > upper);
return integer;
}
I'm geussing maybe I have to include an extra header. If I take away the std:: it just gives me a similar error
我猜也许我必须包含一个额外的标题。如果我拿走 std:: 它只会给我一个类似的错误
‘numeric_limits' was not declared in this scope
'numeric_limits' 未在此范围内声明
回答by Adam Rosenfield
You need to include the header file <limits>, which is where std::numeric_limitsis defined. Your Mac compiler was helping you out by automatically including that header file; however, you should not rely on that behavior and explicitly include any header files you need.
您需要包含头文件<limits>，这std::numeric_limits是定义的位置。您的 Mac 编译器通过自动包含该头文件来帮助您；但是，您不应该依赖该行为并明确包含您需要的任何头文件。
