Question

C++: Write a recursive function that does the following:

Given a number that could be up to 10 digits long, place the commas in the appropriate places.

PLEASE PAY ATTENTION TO THE FOLLOWING:

- Do not use the static modifier. No global variables.

- The input has to be in number format.

For example the number 1087045 would be displayed as

1,087,045

Answer 1

#include <iostream>
#include <iomanip>
using namespace std;

void print_number(int n) {
    if (n < 1000) {
        cout << n;
    } else {
        print_number(n/1000);
        cout << "," << setw(3) << setfill('0') << n%1000;
    }
}

int main() {
    int n;
    cout << "Enter a number: ";
    cin >> n;
    print_number(n);
    cout << endl;
    return 0;
}