C++ Programming Code Examples

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Make Simple Calculator



Make Simple Calculator

To make a simple calculator in C++ programming which performs basic four mathematical operations (addition, subtraction, multiplicatin, and division) depending on the user's choice, use the switch case to identify the input operator to perform required calculation then display the result as shown here in the following program.

Following is a simple C++ program which is a menu-driven program based on simple calculation like addition, subtraction, multiplication and division according to user's choice:
		
#include<iostream.h>
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void main()
{
	clrscr();
	float a, b, res;
	char choice, ch;
	do
	{
		cout<<"1.Addition\n";
		cout<<"2.Subtraction\n";
		cout<<"3.Multiplication\n";
		cout<<"4.Division\n";
		cout<<"5.Exit\n\n";
		cout<<"Enter Your Choice : ";
		cin>>choice;
		switch(choice)
		{
			case '1' : cout<<"Enter two number : ";
				cin>>a>>b;
				res=a+b;
				cout<<"Result = "<<res;
				break;
			case '2' : cout<<"Enter two number : ";
				cin>>a>>b;
				res=a-b;
				cout<<"Result = "<<res;
				break;
			case '3' : cout<<"Enter two number : ";
				cin>>a>>b;
				res=a*b;
				cout<<"Result = "<<res;
				break;
			case '4' : cout<<"Enter two number : ";
				cin>>a>>b;
				res=a/b;
				cout<<"Result = "<<res;
				break;
			case '5' : exit(0);
				break;
			default : cout<<"Wrong Choice..!!";
				break;
		}
		cout<<"\n------------------------------------\n";
	}while(choice!=5 && choice!=getchar());
	getch();
}