Using return value of cin to take unknown number of inputs in C++

Sometimes we need variable number of inputs in our program. In this program we will see how to use cin to take variable number of inputs.

The simple solution is run a loop, and when one specific value is pressed, it stops. The another idea is using the cin >> input. This will return false when value is non-numeric.

Example

#include <iostream>
using namespace std;
main() {
   int input;
   int n = 0;
   cout << "Enter numbers. (To stop enter any character): ";
   while (cin >> input)
   n++;
   cout << "\nTotal number of inputs entered: " << n;
}

Output

Enter numbers. (To stop enter any character): 
5
6
7
2
6
5
j
Total number of inputs entered: 6

Smita Kapse

Updated on: 30-Jul-2019

962 Views

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