/********************************************************************************************
onefile.cpp
	Jim Millard
	for CO311

    simple program in one file

********************************************************************************************/
#include <iostream>
#include <string>

using namespace std;

//prototypes
void SayHello();
void SayPrompt(string);
float squared(const float);

//the MAIN main, which must be here -------------
void main()
    {

    SayHello();
    string prompt = "Enter a number: ";
    SayPrompt(prompt);

    float input;
    cin >> input;

    cout << input << " squared equals " << squared(input) << endl;

    return;
    }

// --------- functions that can later exist elsewhere ---------

void SayHello()
    {
    cout << "This program will display the square of a number you input." << endl;
    }

void SayPrompt(string prompt)
    {
    cout << prompt;
    }

float squared(const float number)
    {
    return number * number;
    }