c++ - C++ 中的过度循环 (Cout)

Question

#include <iostream>
#include <string>
#include <cctype>
using namespace std;
char hold;
string name;
char num1;
char num2;

int main() {
    cout << "Hello!\n";
    cout << "Tell me your name?: ";
    cin >> name;
    cout << "Well well well, if it isn't "<< name << "!\n";
    cout << "Enter a NUMBER " << name << ": ";
    cin >> num1;
    while(!isdigit(num1)) {
        cout << "Enter a NUMBER " << name << ": ";
        cin >> num1;    
    }
    cin >> hold;
    system("pause");
    return 0;
}

问题是，它覆盖了 cout。我该如何解决？

谢谢。

Answer 1

更好的方法是使用std::stringstream(注意:包含sstream)

    int getNumber()
    {
        std::string line;
        int i;
        while (std::getline(std::cin, line))
        {
            std::stringstream ss(line);
            if (ss >> i)
            {
               if (ss.eof())
               {
                  break;
               }
            }
            std::cout << "Please re-enter your input as a number" << std::endl;
        }
        return i;  
     }

这取代了您的 while 循环，您在询问号码后调用电话，因为您已经知道该怎么做。