c++ How to display the info from a certain function in the main()

How do I have the display function display the info within its function body? How to call it? The function is filled with the data I want outputted yet how do I call it and display the contents of the function.

int main()
{
    InputValue();
    displayinfo();




}

void displayinfo(int d, array<char, 7> b)
{
    for (int k = 0; k < d; k++)
    {
        cout << "Semester: " << b[k] << endl;
    }

}