#include <stdio.h>
#include <string.h>
#include <float.h>
#include <stdbool.h>
#define FIRST_OPTION 1
#define SECOND_OPTION 2
#define THIRD_OPTION 3
#define FOURTH_OPTION 4
#define FIFTH_OPTION -1

int main(int argc, char* argv[])
{
    int user_choice;
    while (true)
    {
        bool dont_pass = true;
        printf("Choose one of the following operations:\n");
        printf("\tAdd (%d)\n", FIRST_OPTION);
        printf("\tSubtract (%d)\n", SECOND_OPTION);
        printf("\tMultiply (%d)\n", THIRD_OPTION);
        printf("\tDivide (%d)\n", FOURTH_OPTION);
        printf("\tStop program (%d)\n", FIFTH_OPTION);
        do
        {
            printf("Enter your choice: ");
            scanf("%d", &user_choice);
            dont_pass = user_choice < FIFTH_OPTION || user_choice > FOURTH_OPTION || user_choice == 0;
            if (dont_pass)
            {
                printf("Input not allowed, please try again\n");
            }
            
        } while (dont_pass);

        if(user_choice == -1) return 0;

        double first_operand;
        double second_operand;
        dont_pass = true;
        do
        {
            printf("Please enter the first operand: ");
            scanf("%lf", &first_operand);
            printf("Please enter the second operand: ");
            scanf("%lf", &second_operand);
            if(user_choice == FOURTH_OPTION && second_operand == 0)
            {
                printf("Division by zero\n");
            }
            else if (first_operand < DBL_MIN || second_operand < DBL_MIN)
            {
                printf("Number underflow\n");
            }
            else if(first_operand > DBL_MAX || second_operand > DBL_MAX)
            {
                printf("Number overflow\n");
            }
            else
            {
                dont_pass = false;
            }
        }
        while (dont_pass);

        double result;
        switch(user_choice)
        {
            case FIRST_OPTION:
                result = first_operand + second_operand;
                printf("The result is %.3f\n", result);
                break;
            case SECOND_OPTION:
                result = first_operand - second_operand;
                printf("The result is %0.3f\n", result);
                break;
            case THIRD_OPTION:
                result = first_operand * second_operand;
                printf("The result is %0.3f\n", result);
                break;
            case FOURTH_OPTION:
                result = first_operand / second_operand;
                printf("The result is %2.3f\n", result);
                break;
            default:
                return 0;
        }
    }
    return 0;
}