Write a C Program to Make a Simple Calculator.
Programming is all about solving problems and creating useful applications. One of the fundamental applications that budding programmers often tackle is building a calculator. Calculators are simple yet essential tools that can be created using C, a versatile and widely-used programming language. In this article, we'll walk through the process of creating a simple calculator in C.
Understanding the Problem
Before we start coding, it's essential to understand the problem we're trying to solve. Our goal is to create a basic calculator that can perform four primary arithmetic operations: addition, subtraction, multiplication, and division. Users should be able to enter two numbers and choose the operation they want to perform. The program should then display the result.
Here's a C Program to Make a Simple Calculator:
#include<stdio.h>
#include<conio.h>
void main()
{
// Declare variables to store user input and the result
double num1, num2, result;
char operator;
// Prompt the user to enter the first number
printf("Enter the first number: ");
scanf("%lf", &num1);
// Prompt the user to enter the operator (+, -, *, /)
printf("Enter an operator (+, -, *, /): ");
scanf(" %c", &operator); // Note the space before %c to consume the newline character
// Prompt the user to enter the second number
printf("Enter the second number: ");
scanf("%lf", &num2);
// Perform the selected operation and store the result
switch (operator)
{
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
if (num2 != 0)
{
result = num1 / num2;
}
else
{
printf("Error: Division by zero is not allowed.\n");
return 1; // Exit with an error code
}
break;
default:
printf("Error: Invalid operator.\n");
return 1; // Exit with an error code
}
// Display the result
printf("Result: %lf\n", result);
}
Output:
