c++, 'avg = sum/5' 给了我垃圾值，但写 avg = sum/2 给出了工作，我不知道为什么

Question

我正在尝试用 C++ 创建一个简单的程序。它计算用户输入的 5 个数字的平均值，但是当我运行它时它一直给我一个垃圾值。我花了 30 多分钟来解决这个问题，但我似乎无法弄清楚。

#include <iostream>  

int main() {
    std::cout << "hello this my program" << '\n';
    int sum, avg;

    int numbOne{  }, numbTwo{  }, numbThree{  }, numbFour{  }, numbFive{  };
    std::cout << "enter your first number: ";
    std::cin >> numbOne;

    std::cout << "enter your second number: ";
    std::cin >> numbTwo;

    std::cout << "enter your third number: ";
    std::cin >> numbThree;

    std::cout << "enter your fourth number: ";
    std::cin >> numbFour;

    std::cout << "enter your fifth number:";
    std::cin >> numbFive;

    sum = numbOne+numbTwo+numbThree+numbFour+numbFive;

    avg = sum/5;

    std::cout << "the average is: " << avg << '\n;';
}

这是在控制台中打印的内容。

#include <iostream>  

int main() {
    std::cout << "hello this my program" << '\n';
    int sum, avg;

    int numbOne{  }, numbTwo{  }, numbThree{  }, numbFour{  }, numbFive{  };
    std::cout << "enter your first number: ";
    std::cin >> numbOne;

    std::cout << "enter your second number: ";
    std::cin >> numbTwo;

    std::cout << "enter your third number: ";
    std::cin >> numbThree;

    std::cout << "enter your fourth number: ";
    std::cin >> numbFour;

    std::cout << "enter your fifth number:";
    std::cin >> numbFive;

    sum = numbOne+numbTwo+numbThree+numbFour+numbFive;

    avg = sum/5;

    std::cout << "the average is: " << avg << '\n;';
}

Answer 1

这就是为什么：'\n;' 我确定你想放双引号 .. 或者如果你使用单引号，'\n'然后是';'..

所以它应该是："\n";或'\n';

正如评论中指出的那样，您应该启用编译器警告，例如-Wall和-Wextra。他们会帮助你看到问题-Wmultichar