Question

Create a C++ calculator that allows you to add, multiply, divide, or subtract, and allows you to inlcude an infinite amount of inputted numbers for it.

Answer 1

#include<iostream>
using namespace std;

int main()
{

long num;
long mult=1;
long sum=0;
long sub=0;
char ch;

cout<<"Menu options: "<<endl;
cout<<"--------------------------------------"<<endl;
cout<<"1. Addition"<<endl;
cout<<"2. Subtraction"<<endl;
cout<<"3. Multiplication"<<endl;
cout<<"4. Division"<<endl;
cout<<"--------------------------------------"<<endl<<endl;

while(1)
{
  
int choice;
cout<<"Enter Your choice: ";
cin>>choice;
  
switch(choice)
{
case 1:

while(1)
{
cout<<"Enter a value: ";
cin>>num;
sum=sum+num;
cout<<"Do you want to add another number (y/n): ";
cin>>ch;
if(ch=='N' || ch=='n')
{
break;
}
}
cout<<"Addition of all entered numbers: "<<sum<<endl;
break;

case 2:
long num1,num2;
while(1)
{
cout<<"Enter first number: ";
cin>>num1;
cout<<"Enter second number: ";
cin>>num2;
sub=num1-num2;
cout<<"Subtraction: "<<sub<<endl;
cout<<"Do you want to take another two numbers (y/n): ";
cin>>ch;
if(ch=='N' || ch=='n')
{
break;
}
}
break;

case 3:
while(1)
{
cout<<"Enter a value: ";
cin>>num;
mult=mult*num;
cout<<"Do you want to add another number (y/n): ";
cin>>ch;
if(ch=='N' || ch=='n')
{
break;
}
}
cout<<"Multiplication of all entered numbers: "<<mult<<endl;
break;

case 4:
long dividend,divisor;
double div;
while(1)
{
cout<<"Enter Dividend: ";
cin>>dividend;
cout<<"Enter Divisor: ";
cin>>divisor;

div=(double)dividend/divisor;
cout<<"Division: "<<div<<endl;
cout<<"Do you want to add next two numbers(dividend,divisor) (y/n): ";
cin>>ch;
if(ch=='N' || ch=='n')
{
break;
}
}
break;

default:
cout<<"Invalid option!!";
break;
}
cout<<"\n\nDo you want to perform another operation (y/n): ";
cin>>ch;
if(ch=='N' || ch=='n')
{
break;
}
}

return 0;
}