mini calculator

/*

        Author : Ashish Yadav

        Title : Mini-Calc

        Compiler : GNU-GCC Compiler (Code::Blocks v16.01) 

        Os : Windows 10 Pro

 */

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

int main()

{

            int op;

            float num1,num2;

            printf("\n \n ---------- ***Welcome To Mini Cal-c*** -----------\n");

            printf("0: Exit \n");

            printf("1: Addition \n");

            printf("2: Subtraction \n");

            printf("3: Multiplication \n");

            printf("4: Division\n");

            printf("\n------------------------------------------------------\n");

            printf("Choose an operation\n");

            scanf("%d",&op);

// *******************Addition*******************************

        if (op == 1)

        {

                printf("\n--------------- Addition------------\n");

                printf("enter number 1:\n");

                scanf("%f",&num1);

                printf("enter number 2:\n");

                scanf("%f",&num2);

                printf("\n---------------------------------------------\n");

                printf("Addition of Entered Numbers is:%f\n",num1+num2);

        }

        else

// ************************Subtraction*******************************

            if(op == 2)

        {

                printf("\n------------- Subtraction-------------\n");

                printf("Subtraction Of Type: (Number 1 - Number 2) \n");

                printf("enter number 1:\n");

                scanf("%f",&num1);

                printf("enter number 2:\n");

                scanf("%f",&num2);

                printf("\n--------------------------------------------\n");

                printf("Subtraction Of (Number 1 - Number 2) is:%f\n",num1-num2);

        }

        else

// *******************Multiplication***************************

            if (op == 3)

        {

                printf("\n--------------------Multiplication---------------\n");

                printf("enter number 1:\n");

                scanf("%f",&num1);

                printf("enter number 2:\n");

                scanf("%f",&num2);

                printf("\n-----------------------------------------------\n");

                printf("Multiplication Of Entered Numbers is:%f\n",num1*num2);

        }

        else

// ***********************Division************************************

            if (op == 4)

        {

                printf("\n-------------------- Division----------------\n");

                printf("enter number 1:\n");

                scanf("%f",&num1);

                printf("enter number 2:\n");

                scanf("%f",&num2);

                printf("\n-------------------------------------------------\n");

                printf("Division Of (Number 1/Number 2) is:%f\n",num1/num2);

        }     else

//************************Exit Program************************

        if (op == 0)

        {

            exit(0);

        } else

//***********************Invalid Operation*******************

        {

            printf("\n-------------------------------------------------\n");

            printf("Choose A valid operation\n");

        }

    return 0;

    getch();

}