I want the user to input the day number as the value of the parameter of the called function using cin

So, as you see in the question I want to make the user input the value of the arguement daynum down when I call the function getday, and not me who enters it. However I can’t seem to get it right. I have tried cin << getday(); but it’s wrong I looked in the internet to get an idea I guess and I tried getday(cin); but still it’s wrong kinda clueless here about how to use cin with the function call.

#include <iostream>

using namespace std;

string getday(int daynum){
    string dayname;
switch(daynum){
case 0:
    dayname = "sunday";
    break;
case 1:
    dayname = "Monday";
    break;
case 2:
    dayname = "Tuesday";
    break;
default:
   dayname = "invalid day number";


}
return dayname;
}


int main()
{

cout << "Enter daynum" << endl;



    return 0;
}

>Solution :

You have to create a temporary variable, fill it with user value using cin, and then pass it to your function:

string getday(int daynum)
{
    string dayname;
    switch (daynum)
    {
        case 0:
            dayname = "sunday";
            break;
        case 1:
            dayname = "Monday";
            break;
        case 2:
            dayname = "Tuesday";
            break;
        default:
            dayname = "invalid day number";
    }
    return dayname;
}

int main()
{
    cout << "Enter daynum" << endl;
    int daynum;
    cin >> daynum;
    cout << getday(daynum) << endl;

    return 0;
}