C++ 简单的C++密码程序
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Simple C++ password program
提问by LoreleiRS
I'm learning to use C++ and I decided to create a password program where the user is asked for the password and it compares the user input to the password and returns a wrong or a right. For some reason, this programs always returns a wrong and I'm not sure why. It must be something to do with comparing the strings but I'm not sure.
我正在学习使用 C++，我决定创建一个密码程序，在该程序中要求用户输入密码，并将用户输入与密码进行比较并返回错误或正确。出于某种原因，这个程序总是返回错误，我不知道为什么。这一定与比较字符串有关，但我不确定。
#include <iostream>
#include <string>
using namespace std;
int main(){
string pass = "password";
string input;
cout << "What is your password: ";
cin >> input;
if (input==pass){
cout << "Correct" << endl;
}else{
cout << "Wrong" << endl;
}
return 0;
}
I would love some help from programmers who are in any way more well versed in C++ as I've just transferred over to C++ from Python and the transitions a bit rocky.
我希望得到一些更精通 C++ 的程序员的帮助，因为我刚刚从 Python 转移到 C++ 并且转换有点困难。
回答by cLoudsyk
1.you could use compare function, to see:http://www.cplusplus.com/reference/string/string/compare/
1.你可以使用比较功能，查看：http://www.cplusplus.com/reference/string/string/compare/
2.you should debug at line if (input==pass){ to print pass and input and check if they are the same.
2.您应该在 if (input==pass){ 行调试以打印 pass 和 input 并检查它们是否相同。
回答by Steve
I found I needed to:
我发现我需要：
#include <string>
to get the definition of the insertion operator (for cin >> input;) and std::string::operator==() (for if (input==pass)). Once I did that, it worked fine in Visual C++.
获取插入运算符（for cin >> input;）和std::string::operator==()（for if (input==pass)）的定义。一旦我这样做了，它在 Visual C++ 中运行良好。
What compiler are you using?
你用的是什么编译器？
