# Implementing a Basic Calculator in C

## Introduction

A basic calculator is a simple yet practical application that can perform arithmetic operations like addition, subtraction, multiplication, and division. In this guide, we'll walk you through the process of implementing a basic calculator in C, explain how it works, and provide sample code to illustrate its usage.

## Designing the Calculator

Our basic calculator will be a console application that allows users to enter two numbers and choose an operation. The calculator will then perform the selected operation and display the result.

## Sample Code

Let's explore the sample code for implementing the basic calculator in C:

``#include <stdio.h>int main() {    char operator;    double num1, num2;    printf("Enter an operator (+, -, *, /): ");    scanf(" %c", &operator);    printf("Enter two numbers: ");    scanf("%lf %lf", &num1, &num2);    switch (operator) {case '+':    printf("Result: %.2lf\\n", num1 + num2);    break;case '-':    printf("Result: %.2lf\\n", num1 - num2);    break;case '*':    printf("Result: %.2lf\\n", num1 * num2);    break;case '/':    if (num2 == 0) {printf("Error: Division by zero\\n");    } else {printf("Result: %.2lf\\n", num1 / num2);    }    break;default:    printf("Error: Invalid operator\\n");    break;    }    return 0;}    ``

## Usage

To use the calculator, follow these steps:

1. Run the program.
2. Enter an operator (+, -, *, /) when prompted.
3. Enter two numbers when prompted.
4. The program will calculate the result and display it.

## Conclusion

Implementing a basic calculator in C is a practical exercise that helps you understand user input, arithmetic operations, and decision-making with switch statements. This guide introduced the concept of a basic calculator, explained how it works in C, and provided sample code to demonstrate its usage. As you continue your C programming journey, you can expand and enhance this calculator or create more advanced applications.