让 cin 读取返回字符的 C++

2022-01-19 00:00:00 input return iostream c++ cin

我想知道如何使用 cin 以便如果用户没有输入任何值而只是按 ENTER 那 cin 将识别这是有效的输入.

I was wondering how to use cin so that if the user does not enter in any value and just pushes ENTER that cin will recognize this as valid input.

推荐答案

你可能想试试 std::getline:

#include <iostream>
#include <string>

std::string line;
std::getline( std::cin, line );
if( line.empty() ) ...

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