Question

In this lab you will code a simple calculator. It need not be anything overly fancy, but it is up to you to take it as far as you want. You will be creating this program in three small sections. You have the menu, the performance of the basic arithmetic operations (Addition, Subtraction Multiplication, and Division), and the looping. You may want to get the switch menu working first, and then fill in the code for these four arithmetic operations our program will keep a running total. It should print the subtotal out after each and every calculation. In addition, the total should be printed before the program quits. So with that being said, the program needs to define a data field, named total at the beginning of main and set it to zero Menu systems in C+ (and other languages) are often represented as a switch statement. Design a switch statement that handles five cases and a default case case 0 Exit case 1- Addition case 3- Multiplication default - Error message » case 2-Subtraction case 4 Division Make sure to print out a list of options explaining to the user what each case does, like"Enter 1 to add a number to total" or "Enter 2 to subtract a number from total". This menu should appear before the switch statements. It is also vital to allow the user to input their choice of 0-4 At this point, you should have a working menu that does nothing. It is time to add code to each of the cases so that they will do the function you displayed to the user. Start by writing code inside of case 1 that will prompt the user to enter a single number. Since this case is for addition, you will want to make sure to add the number you entered to the running total. Once this works, you should do the same for the other mathematical functions. Only substituting in the other three operation (Subtraction, Multiplication, and Division) Allowing the user to select which function then input data is nice. But how often do you open the calculator and do just a single calculation? It would be a good idea to wrap your entire menu into some sort of structure that allows it to repeat more than a single time. If you were to use such a thing, how would you stop it? Part C is to surround your entire program thus far with a loop that allows it to be run more than once. It would also be a good idea to allow for exiting this loop. Be sure to print out a sub total each time the loop runs

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new C++ program with name "main.cpp" is created, which contains following code.

main.cpp :

//Progarm to do arithmetic operation in C++
#include <iostream>
using namespace std;
//main method
int main()
{
//declaring variables
float runningTotal=0,n;
int number;
bool flag=true;
//using while loop
while(flag)
{
//showing menu system
cout<<"1.Enter 1 to add a number to total"<<endl;
cout<<"2.Enter 2 to subtract a number from total"<<endl;
cout<<"3.Enter 3 to multiply a number by total"<<endl;
cout<<"4.Enter 4 to divide a total by number"<<endl;
cout<<"5.Enter 0 to Exit program"<<endl;
//reading user input
cin>>number;
//passing number to switch case
switch(number)
{
//exit case
case 0:flag=false;
break;
//addition
case 1:cout<<"Enter number"<<endl;
cin>>n;
//add number and display total
runningTotal=runningTotal+n;
cout<<"Total : "<<runningTotal<<endl;
break;
//subtraction
case 2:cout<<"Enter number"<<endl;
cin>>n;
//subtract number and display total
runningTotal=runningTotal-n;
cout<<"Total : "<<runningTotal<<endl;
break;
//multiplication
case 3:cout<<"Enter number"<<endl;
cin>>n;
//multiply number and display total
runningTotal=runningTotal*n;
cout<<"Total : "<<runningTotal<<endl;
break;
case 4:cout<<"Enter number"<<endl;
cin>>n;
//divide number and display total
runningTotal=runningTotal/n;
cout<<"Total : "<<runningTotal<<endl;
break;
default:cout<<"Enter valid number"<<endl;
break;
}
}

return 0;
}

======================================================

Output : Compile and Run above program , will get the screen as shown below

Screen 1 :Screen showing menu

input 1.Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3.Enter 3 umber by total 4.Enter 4 to divide a total by number 5.Enter 0 to Exit program to multiply a n

Screen 2:Screen showing run1

input 1.Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3.Enter 3 to multiply a number by total 4.Enter 4 to divide a total by number 5.Enter 0 to Exit program Enter number 10 Total 10 1.Enter 1 to add a number to total 2. Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total 4.Enter 4 to divide a total by number 5. Enter 0 to Exit program Enter number Total : 55 1.Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3.Enter 3 to multiply a number by total 4.Enter 4 to divide a total by number 5.Enter 0 to Exit program Enter number Total 18.3333

1.Enter 1 to add a number to tota 2. Enter 2 to subtract a number from total 3.Enter 3 to multiply a number by total 4. Enter 4 to divide a total by number Enter to Exit program Enter number 20.5 Total : 38.8333 1.Enter 1 to add a number to total 2. Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total ●Enter 4 to divide a total by number Enter to Exit program 2 Enter number Total : 33.8333 1.Enter 1 to add a number to tota 2. Enter 2 to subtract a number from total 3.Enter 3 to multiply a number by total 4. Enter 4 to divide a total by number Enter to Exit program

Screen 3 :Screen showing run 3

input 1.Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total 4.Enter 4 to divide a total by number 5. Enter 0 to Exit progr am Enter number 100 Total 100 1. Enter 1 to add a number to total 2. Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total 4. Enter 4 to divide a total by number 5. Enter 0 to Exit program 2 Enter number 50 Total : 50 1. Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total 4.Enter 4 to divide a total by number 5. Enter 0 to Exit progr am Enter number 30 Total 1500

1.Enter 1 to add a number to total 2.Enter 2 to subtract 3.Enter 3 to multiply a number by total 4. Enter 4 to divide a total by number 5-Enter 0 to Exit program 4 Enter number 5 Total : 300 1.Enter 1 to add a number to total 2.Enter 2 to subtract a number from total 3. Enter 3 to multiply a number by total ●Enter 4 to divide a total by number a number from total Enter 0 to Exit program

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.