How to Take Multiple Input from User in C++?

In C++, we use cin when we want to take input from the user. We often also need to take more than one input at a time. In this article, we will learn how to take multiple inputs in C++.

Take Multiple Inputs from a User in C++

To take multiple inputs from users, we can repeatedly use the std::cin using loops. It will allow the user to enter the data till required. We can use any data container to store the data entered by the user.

C++ Program to Take Multiple Inputs from User

The below example demonstrates how we can take multiple inputs from a user in C++.

C++

// C++ program to input multiple items
#include <iostream>
#include <vector>
using namespace std;

int main()
{
    int n;
    // Input the number of elements
    cout << "Enter the number of elements you want to "
            "input: ";
    cin >> n;

    // Initialize a vector of size n
    vector<int> vec(n);

    // Input n numbers into the vector
    cout << "Enter " << n << " numbers: ";
    for (int i = 0; i < n; i++) {
        cin >> vec[i];
    }

    // Output the entered numbers
    cout << "You entered: ";
    for (int i : vec) {
        cout << i << " ";
    }
    cout << endl;

    return 0;
}

Output

Enter the number of elements you want to input: 5
Enter 5 numbers: 1 2 3 4 5
You entered: 1 2 3 4 5

Time Complexity: O(n), where n is the number of elements you want to enter.
Space Complexity: O(n)