如何讓我的功能帶回真或假

Question

我是C++的新手，我真的被困在這個問題： 當用戶輸入2個數字EX：1和2比代碼必須找出是否第一個數字是否與第一個數字相同，問題是該代碼沒有將文本帶來的真或假作爲數字：/ （0 = false 1 = true）

代碼在這裏：

#include <iostream> 

/* run this program using the console pauser or add your own getch, system("pause") or input loop */ 

bool GraterFunct(int num1, int num2); 

int main(int argc, char** argv) 

{ 
    std::cout <<" \n Hello there! This is a test to test how good you are with math. \n "; 
    std::cout <<" Now enter G or L (Grater, less) to know if a number is grater or less than the number you choose \n "; 
    char answer [1]; 
    std::cin >> answer; 

    if(answer == "G" || "g") 
    { 
     int number1; 
     int number2; 
     std::cout << "You selected: Grater than, \n"; 
     std::cout << "Now type 2 numbers and see which one is grater than the other one. \n" << std::endl; 
     std::cin >> number1; 
     std::cout << "Your first number: " << number1 << std::endl; 
     std::cout << "Select your second number \n"; 
     std::cin >> number2; 
     std::cout << "The answer is: " << GraterFunct(number1, number2); 
    } 

    return 0; 
} 

bool GraterFunct(int num1, int num2) 
{ 
    if(num1 >= num2) 
    { 
     { 
      return true; 
     } 
    } 
    else 
    { 
     if(num2 >= num1) 
     { 
      return false; 
     } 
    } 
} 

請幫忙！提前致謝！

Answer 1

要格式化布爾值true和false可以使用std::boolalpha操縱設置std::ios_base::boolalpha標誌：

std::cout << std::boolalpha << "true=" << true << " false=" << false << '\n'; 

如果你是一個非英語母語者和我一樣，你可能要更改格式這些價值。假設有安裝，你可以只imbue()成流，也可以創建你自己和你想要的任何的true渲染和false語言環境，如合適的語言環境：

#include <iostream> 
#include <locale> 

class numpunct 
    : public std::numpunct<char> 
{ 
    std::string do_truename() const { return "wahr"; } 
    std::string do_falsename() const { return "falsch"; } 
}; 

int main() 
{ 
    std::cout.imbue(std::locale(std::locale(), new numpunct)); 
    std::cout << std::boolalpha << "true=" << true << " false=" << false << '\n'; 
} 

順便說一句，你總是需要驗證您輸入是成功的，例如：

if (std::cin >> number1) { 
    // deal with the successful input here 
} 
else { 
    // deal with the wrong input here 
}