C Programming: Basic Calculator

In this C programming tutorial, we'll create a basic calculator that takes user input for an operator and two numbers, performs the requested operation, and displays the result.

Code: Simple Calculator in C

#include <stdio.h>

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

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

    printf("\nEnter number 1:");
    scanf("%lf", &num1);

    printf("\nEnter number 2:");
    scanf("%lf", &num2);

    switch (operator) {
        case '+':
            result = num1 + num2;
            printf("Result: %.2lf", result);
            break;
        case '-':
            result = num1 - num2;
            printf("Result: %.2lf", result);
            break;
        case '*':
            result = num1 * num2;
            printf("Result: %.2lf", result);
            break;
        case '/':
            result = num1 / num2;
            printf("Result: %.2lf", result);
            break;
        default:
            printf("%c is not valid", operator);
    }

    return 0;
}
    

This C program allows users to input an operator (+, -, *, /) and two numbers. It then performs the requested operation and displays the result with two decimal places.

Explanation:

The code uses the switch statement to determine the operation based on the entered operator. The result is calculated accordingly and displayed to the user.

Conclusion

You've just created a simple calculator using C programming! This example is a great introduction to basic user input and decision-making in C. Feel free to experiment with the code and explore more advanced programming concepts.

If you have any questions or need further clarification, don't hesitate to leave a comment below.