Simple Calculator | C

 Create a simple calculator using C programming.

 

Solution:

#include<stdio.h>

int main()

{

    double a,b;

    int o;

    int c=1;

    do

    {

        printf("Enter numbers:\n");

        scanf("%lf %lf",&a,&b);

        printf("Enter operator:\n");

        operator:printf("\t[1] Addition\n\t[2] Subtraction\n\t[3] Multiplicaion\n\t[4] Division\n");

        scanf("%d",&o);

        if(o==1){

            printf("\t%.0lf + %.0lf = %.0lf\n\n",a,b,(a+b));

        }

        else if(o==2){

            printf("\t%.0lf - %.0lf = %.0lf\n\n",a,b,(a-b));

        }

        else if(o==3){

            printf("\t%.0lf * %.0lf = %.0lf\n\n",a,b,(a*b));

        }

        else if(o==4){

            printf("\t%.0lf / %.0lf = %.2lf\n\n",a,b,(a/b));

        }

        else{

            printf("\nPlease enter a valid operator!\n");

            goto operator;

        }

        printf("Want to calculate again?\n\t[1] Main Menu\n\t[0] Exit.\n");

        scanf("%d",&c);

    }while(c==1);

    printf("\nThank you for using our calculator.\n");

    return 0;

}