Simple Calculator Program using switch Statement

Below is the C program to implement a simple calculator using a switch case statement:

C

// C Program to make a Simple Calculator
// Using switch case
#include <stdio.h>
#include <stdlib.h>
 
// Driver code
int main()
{
    char ch;
    double a, b;
    while (1) {
        printf("Enter an operator (+, -, *, /), "
               "if want to exit press x: ");
        scanf(" %c", &ch);
 
        // to exit
        if (ch == 'x')
            exit(0);
        printf("Enter two first and second operand: ");
        scanf("%lf %lf", &a, &b);
 
        // Using switch case we will differentiate
        // operations based on different operator
        switch (ch) {
 
        // For Addition
        case '+':
            printf("%.1lf + %.1lf = %.1lf\n", a, b, a + b);
            break;
 
        // For Subtraction
        case '-':
            printf("%.1lf - %.1lf = %.1lf\n", a, b, a - b);
            break;
 
        // For Multiplication
        case '*':
            printf("%.1lf * %.1lf = %.1lf\n", a, b, a * b);
            break;
 
        // For Division
        case '/':
            printf("%.1lf / %.1lf = %.1lf\n", a, b, a / b);
            break;
 
        // If operator doesn't match any case constant
        default:
            printf(
                "Error! please write a valid operator\n");
        }
 
        printf("\n");
    }
}

Output

Enter an operator (+, -, *, /), if want to exit press x: +
Enter two first and second operand: 7 8
7.0 + 8.0 = 15.0
Enter an operator (+, -, *, /), if want to exit press x: -
Enter two first and second operand: 8 9
8.0 - 9.0 = -1.0
Enter an operator (+, -, *, /), if want to exit press x: *
Enter two first and second operand: 8 7
8.0 * 7.0 = 56.0
Enter an operator (+, -, *, /), if want to exit press x: /
Enter two first and second operand: 8 3
8.0 / 3.0 = 2.7
Enter an operator (+, -, *, /), if want to exit press x: x

Complexity Analysis

Time Complexity: O(1)

Auxiliary Space: O(1)

C Program to Make a Simple Calculator

A calculator is an electronic device that is used to perform arithmetic operations like addition, subtraction, multiplication, division, etc. We can create a simple calculator program in C to perform all these basic calculations. In this article, we will see how to create a simple calculator in C using the switch statement.

This program takes an arithmetic operator (+, -, *, /) and two operands as the input. It then checks whether the user wants to quit the program if yes then quit it, for this, we can use a special character and tell the user about it, like here we used “x”. The operation is performed based on the operator.

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Simple Calculator Program using switch Statement

C

Complexity Analysis

C Program to Make a Simple Calculator

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