CodeAlpha_BasicCalculator.c

#include<stdio.h>

int main() {
    while(1) {
        int ch;

        printf("\n=== Basic Calculator ===\n");
        printf("1) Addition\n");
        printf("2) Subtraction\n");
        printf("3) Multiplication\n");
        printf("4) Division\n");
        printf("5) Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &ch);

        if(ch == 5) {
            printf("Exiting...\n");
            break;
        }

        switch(ch) {

            case 1: {
                int a, b;
                printf("Enter first number: ");
                scanf("%d", &a);
                printf("Enter second number: ");
                scanf("%d", &b);

                int c = a + b;
                printf("Sum = %d\n", c);
                break;
            }

            case 2: {
                int a, b;
                printf("Enter first number: ");
                scanf("%d", &a);
                printf("Enter second number: ");
                scanf("%d", &b);

                int c = a - b;
                printf("Difference = %d\n", c);
                break;
            }

            case 3: {
                int a, b;
                printf("Enter first number: ");
                scanf("%d", &a);
                printf("Enter second number: ");
                scanf("%d", &b);

                int c = a * b;
                printf("Product = %d\n", c);
                break;
            }

            case 4: {
                float a, b;
                printf("Enter first number: ");
                scanf("%f", &a);
                printf("Enter second number: ");
                scanf("%f", &b);

                if(b == 0) {
                    printf("Division by zero is not possible.\n");
                } else {
                    float c = a / b;
                    printf("Quotient = %.2f\n", c);
                }
                break;
            }

            default:
                printf("Invalid choice! Please try again.\n");
        }
    }

    return 0;
}