Question

我被赋予了显示斐波那契数字的任务，但同时询问用户他/她想要在给定时间内计算的数量。

他们告诉我这本书中有一个例子。我认为代码中的几行更改会产生我的问题的答案，但我无法理解我的代码出错的地方。

int main()
{ 
    int NumsToCal = 5;

    cout << "How many numbers would you like to calculate?" << endl;
    cin >> NumsToCal;

    cout << " This program will calculate " << NumsToCal << " Fibonacci Numbers at a time" <<endl;

    int Num1 = 0, Num2 = 1;
    char WantMore = '\0';
    cout << Num1 << " " << Num2 << " " ;

    do 
    {
        for( int Index = 0; Index < NumsToCal; ++Index)
        {
            cout << Num1 + Num2 << " ";

            int Num2Temp = Num2;
            Num2 = Num1 + Num2;
            Num1 = Num2Temp;
        }
        cout <<  "Do you want more numbers (y/n)? " << endl;
        cin >> WantMore;

    } while (WantMore == 'y');

        cout << "Goodbye!" << endl;

    return 0;
}

Answer 1

Xsami是绝对正确的。您只需要再添加一行，如：

cin>>NumstoCal;

虽然改变输出内容的方式并不是一件坏事，但更清晰一点。

这是我的代码： https://ideone.com/BXREP9

Answer 2

你唯一要做的就是再次阅读NumsToCal，你必须在cin >> WantMore;

之后做这样的事情

if ( WantMore == 'y' ) 
{
    Num1 = 0;
    Num2 = 1;
    cout << "How many numbers would you like to calculate?" << endl;
    cin >> NumsToCal;
    cout << Num1 << " " << Num2 << " " ;
}

这是我的代码：http://ideone.com/a8um5Z

如何在嵌套循环中请求用户输入？

2 个答案: