How do i call a function that has a string and an int in the header?

March 29, 2023

I’m having trouble with why my code isn’t being called properly. I feel like I have it correct 90% of the way. My code is meant to repeat the word "n" amount of times.

string repeat(string str, int n);
int main ()
{
    string repeat_main;
    repeat_main = repeat("str", 5);
}

string repeat(string str, int n)
{
    string repeated_str;
    int i = 0;
    cout << "enter the word you would like to repeat: ";
    cin >> str;
    cout << "how many times would you like it to repeat? ";
    cin >> n;

    while (i < n)
    {
        repeated_str += str;
        i++;
    }
    return repeated_str;
}

I try calling the repeat function into my main function it does not display what I am looking for.

>Solution :

As far as I can tell, there are two issues with your code:

You need to forward declare the function if you plan to define it after main.
You need to cout << repeat_main so that the string is printed.

#include <string>
#include <iostream>

using namespace std;

string repeat(string str, int n);

int main ()
{
    cout << repeat("str", 5);
}

string repeat(string str, int n)
{
    string repeated_str;
    int i = 0;
    cout << "enter the word you would like to repeat: ";
    cin >> str;
    cout << "how many times would you like it to repeat? ";
    cin >> n;

    while (i < n)
    {
        repeated_str += str;
        i++;
    }

    return repeated_str;
}

As noted in comments, if you’re just going to have your function prompt for input, then you can remove the useless parameters.

string repeat()
{
    string repeated_str;
    string str;
    int n;
    int i = 0;
    cout << "enter the word you would like to repeat: ";
    cin >> str;
    cout << "how many times would you like it to repeat? ";
    cin >> n;

    while (i < n)
    {
        repeated_str += str;
        i++;
    }

    return repeated_str;
}

Or keep those, and use them, handling the IO in your main.

string repeat(string str, int n)
{
    string repeated_str;
    int i = 0;

    while (i < n)
    {
        repeated_str += str;
        i++;
    }

    return repeated_str;
}