CPPForSchool.com: User Defined Function Set 2 Assignment 1

1. Write a program that lets the user perform arithmetic operations on two numbers. Your program must be menu driven, allowing the user to select the operation (+, -, *, or /) and input the numbers. Furthermore, your program must consist of following functions:


1. Function showChoice: This function shows the options to the user and explains how to enter data.
2. Function add: This function accepts two number as arguments and returns sum.
3. Function subtract: This function accepts two number as arguments and returns their difference.
4. Function multiply: This function accepts two number as arguments and returns product.
5. Function divide: This function accepts two number as arguments and returns quotient.
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Just like when I was in school, it appears the more complex the assignment, the greater chances I have of success.  I could never figure out why the simple stuff always got me stuck, while larger problems felt more natural.  Nevertheless, I am unable to provide a screenshot of my code nor the sample source.  Instead, I have copied and pasted both below.  However, I will be able to provide screenshots of the outputs.

**It appears I went with a different direction in regards to order of the menu.  The user is blindly prompted for the integers first, then the menu option of arithmetic operators are presented.  Also, I did not utilize a do/while loop.**

#include <iostream>
using namespace std;

/* User Defined Function: Arithmetic Operations version 1.0 */
/* Coded by Sherwin Bautista */
/* Assignment by cppforschool.com */
/* http://www.cppforschool.com/assignment/user_2.html */

void showChoices();
float add(float, float);
float subtract(float, float);
float multiply(float, float);
float divide(float, float);

int main()
{
    cout << "-------------------------------------" << endl;
    cout << "--------ARITHMETIC OPERATIONS--------" << endl;
    cout << "----------------BY-------------------" << endl;
    cout << "----------SHERWIN BAUTISTA-----------" << endl;
    cout << "-------------------------------------" << endl;

    float x, y;
    int menuSelect;
    cout << "Please enter first integer: ";
    cin >> x;
    cout << "Please enter second integer: ";
    cin >> y;

    showChoices();
    cin >> menuSelect;
    switch (menuSelect)
    {
    case 1:
        cout << "The sum of " << x << " and " << y << " is: " << add(x,y);
        break;
    case 2:
        cout << "The difference of " << x << " and " << y << " is: " << subtract(x,y);
        break;
    case 3:
        cout << "The product of " << x << " and " << y << " is: " << multiply(x,y);
        break;
    case 4:
        cout << "The quotient of " << x << " and " << y << " is: " << divide(x,y);
        break;
    case 5:
        cout << "Thank you for playing!" << endl;
        break;
    default:
        cout << "Invalid input, please try again." << endl;
    }

    return 0;
}

void showChoices()
{
    cout << "Please select from the following (1, 2, 3, 4):" << endl;
    cout << "1. Addition" << endl;
    cout << "2. Subtraction" << endl;
    cout << "3. Multiplication" << endl;
    cout << "4. Division" << endl;
    cout << "5. Exit" << endl;
}

float add(float a, float b)
{
    return a + b;
}
float subtract(float a, float b)
{
    return a - b;
}
float multiply(float a, float b)
{
    return a * b;
}
float divide(float a, float b)
{
    return a / b;
}

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Below are the sample source and output.

#include <iostream>
using namespace std;

void showChoices();
float add(float, float);
float subtract(float, float);
float multiply(float, float);
float divide(float, float);

int main()
{
 float x, y;
 int choice;
 do
 {
  showChoices();
  cin >> choice;
  switch (choice)
  {
  case 1:
   cout << "Enter two numbers: ";
   cin >> x >> y;
   cout << "Sum " << add(x,y) <<endl;
   break;
  case 2:
   cout << "Enter two numbers: ";
   cin >> x >> y;
   cout << "Difference " << subtract(x,y) <<endl;
   break;
  case 3:
   cout << "Enter two numbers: ";
   cin >> x >> y;
   cout << "Product " << multiply(x,y) <<endl;
   break;
  case 4:
   cout << "Enter two numbers: ";
   cin >> x >> y;
   cout << "Quotient " << divide(x,y) <<endl;
   break;
  case 5:
   break;
  default:
   cout << "Invalid input" << endl;
  }
 }while (choice != 5);

 return 0;
}

void showChoices()
{
 cout << "MENU" << endl;
 cout << "1: Add " << endl;
 cout << "2: Subtract" << endl;
 cout << "3: Multiply " << endl;
 cout << "4: Divide " << endl;
 cout << "5: Exit " << endl;
 cout << "Enter your choice :";
}

float add(float a, float b)
{
 return a + b;
}

float subtract(float a, float b)
{
 return a - b;
}

float multiply(float a, float b)
{
 return a * b;
}

float divide(float a, float b)
{
 return a / b;
}