c++ – Checking for errors, exiting the loop

Question:

Is it possible to make it so that when a number is entered, the program is executed until a key combination is entered, for example Ctrl + Z, but at the same time a check is performed, if a character is entered, then the program displays an error message and re-asks to enter the number?

while (true) {
    cout << "Input your number: ";
    cin >> value;
    if (!cin.good())
    {
        if (value == 'q')
            exit(0);
        else
        {
        while (!cin)
        {
            cin.clear();
            while (cin.get() != '\n')
                continue;
            cout << "Error!\n";
            cout << "Input your number: ";
            continue;
        }
    }
} 

Answer:

#include <iostream>
#include <string>

using namespace std;

int main(){
  string stringValue;
  double numericValue;

  while (true) {
    cout << "Input your number: ";
    if ( std::cin >> numericValue ) {
      // если введено число продолжаем ввод
    } else {
      // пробуем считать строку из введенного значения
      std::cin.clear(); // очищаем буфер!
      if ((std::cin >> stringValue) ) {
        if (stringValue == "q") {
          exit(0);
        } else {
          cout << "Enter numner or 'q' for exit:" << endl;
        }
      }
    }
  }
}