#include <stdio.h>
#include <stdlib.h>
#include "mathMaster.h"
 
int main() {
   FILE *score;
   double x;
   double y;
   double z;
   int c;
   int scores;
   scores = 0;
   while (1) {
      printf(
            "Enter 's' to input two double values, and the sum of these values: \n");
 
      printf(
            "Enter 'p' to input two double values, and the product of these values: \n");
 
      printf(
            "Enter 'd' to input two double values, and the difference of these values: \n");
 
      printf(
            "Enter 'm' to input two double values, and the maximum of these values: \n");
 
      printf(
            "Enter 'n' to input two double values, and the minimum of these values: \n");
 
      printf("Enter 'q' to quit.\n");
      c = getchar();
      while (getchar() != '\n') {
         ;
      }
      if ((c == 'q') || (c == 'Q')) { /* Checking if user chose to quit program */
         if ((score = fopen("a4.score", "r")) != NULL) {
            fprintf(stderr,
                  "Score file exists, would you like to overwrite? (Y/N)\n ");
            c = getchar();
         }
         while (getchar() != '\n') {
            ;
         }
 
         if (fclose(score) == EOF) {
            fprintf(stderr, "File cannot close properly\n");
            return EXIT_FAILURE;
         }
 
         if (!(c == 'y' || c == 'Y')) {
            fprintf(stderr,
                  "Leaving score file untouched, terminating program.\n");
            return EXIT_SUCCESS;
         }
 
         if ((score = fopen("a4.score", "w")) == NULL) {
            fprintf(stderr, "Cannot open scores. \n");
            return EXIT_FAILURE;
         }
 
         fprintf(score, "Your score is:  %d", scores);
 
         if (fclose(score) == EOF) {
            fprintf(stderr, "Unable to close score file\n");
            return EXIT_FAILURE;
         }
 
         printf("Cya Later ! Thank's for participating! \n");
         return EXIT_SUCCESS;
      }
 
      if (scanf("%lf%lf%lf", &x, &y, &z) != 3) { /* Checking to make sure correct input form */
         fprintf(stderr, "Invalid Input.\n");
         return EXIT_FAILURE; /* If wrong input, program exits */
      }
 
      if (mathMaster(c, x, y, z)) { /* If the user is correct , according to mathMaster function, then scores is increased */
         scores++;
      }
   }
   return EXIT_SUCCESS;
}