Basic Calculator using C Language 🧮

Leave a Comment / Programming / By mismail78p@gmail.com

Below is the complete code for a **Basic Calculator** in C. This program can perform Addition, Subtraction, Multiplication, and Division.

To compile & play with it online use link: Programiz C Online Compiler

#include <stdio.h>

int main() {
    char operator;
    double num1, num2, result;

    printf("Enter an operator (+, -, *, /): ");
    scanf(" %c", &operator);

    printf("Enter first number: ");
    scanf("%lf", &num1);

    printf("Enter second number: ");
    scanf("%lf", &num2);

    switch(operator) {
        case '+':
            result = num1 + num2;
            printf("Result: %.2lf + %.2lf = %.2lf\n", num1, num2, result);
            break;

        case '-':
            result = num1 - num2;
            printf("Result: %.2lf - %.2lf = %.2lf\n", num1, num2, result);
            break;

        case '*':
            result = num1 * num2;
            printf("Result: %.2lf * %.2lf = %.2lf\n", num1, num2, result);
            break;

        case '/':
            if(num2 != 0) {
                result = num1 / num2;
                printf("Result: %.2lf / %.2lf = %.2lf\n", num1, num2, result);
            } else {
                printf("Error: Division by zero is not allowed!\n");
            }
            break;

        default:
            printf("Invalid operator!\n");
    }

    return 0;
}