Assignments » User Defined Function » Set2 » Solution 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 mulitiply: This function accepts two number as arguments and returns product.
5. Function divide: This function accepts two number as arguments and returns quotient.

    
#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;
}

MENU
1: Add
2: Subtract
3: Multiply
4: Divide
5: Exit
Enter your choice :1
Enter two numbers: 12 24
Sum 36

MENU
1: Add
2: Subtract
3: Multiply
4: Divide
5: Exit
Enter your choice :2
Enter two numbers: 40 25
Difference 15

MENU
1: Add
2: Subtract
3: Multiply
4: Divide
5: Exit
Enter your choice :3
Enter two numbers: 8.6 2.4
Product 20.64

MENU
1: Add
2: Subtract
3: Multiply
4: Divide
5: Exit
Enter your choice :4
Enter two numbers: 10 4
Product 2.5

MENU
1: Add
2: Subtract
3: Multiply
4: Divide
5: Exit
Enter your choice :7
Invalid input

 

 

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