agg/src/agg.c

// Made with GNU/Linux
#include <stdio.h>
#include <stdbool.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int isvalidnumber(char entered []) {
    int valid = 1;
    for (int i = 0; i < strlen(entered); i++) {
        switch (entered[i]) {
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
        case '.':
        case '-':
            break;
        default:
            valid = 0;
            break;
        }
    }
    return valid;
}

int main(void) {

  srand(time(NULL));
  char input[2];
  int tempInput;
  char *username = getenv("USER");
  bool tutorial;

  #if !defined(__linux__)
    printf ("This program has not and will not be tested on non Linux systems! If you experience errors, do not report them!\nIf you wish to fix an issue, please excercise your rights under the GNU Affero Public License Version 3.\nI may occasionally test using wine, however I will never test using native win32, so errors may occur due to this.\n\n"
  #endif

  printf ("Hello %s!\nThis is a game written for AgnoxGD.\nWould you like to see a tutorial\nType 1 for no, or 0 for yes.\n", username);
  scanf("%s", input);
  if (isvalidnumber(input)) {
    sscanf(input, "%d", &tempInput);
    tutorial = tempInput;
  } else {
    printf ("Error! An invalid character was entered.\n");
    exit(1);
  }
  if (tutorial) {
    printf ("OK! Lets continue.\n");
  } else {
    printf ("Welcome to Agg! This game tests your math skills against the clock.\n\nHow to Play:\n\n1.  Set Your Playtime: First, you'll decide how long you want to play by entering a duration in seconds.\n2.  Solve Math Problems: Once the game starts, you'll be presented with a series of random math problems: addition, division, subtraction, and multiplication. Your goal is to solve as many as you can before time runs out.\n3.  Enter Your Answer: After each problem, type your answer and press Enter. The game will immediately tell you if you're correct or incorrect.\n4.  Rack Up Points: For every correct answer, you'll earn a point. Your score will be tallied at the end.\n5.  Time's Up! The game ends automatically when your chosen playtime runs out. Good luck, and have fun!\n"); }

  int accuracytype;
  printf ("\nWould you like your accuracy as a float or as an int? Type 0 for float or 1 for int.\n");
  scanf ("%s", input);

  if (isvalidnumber(input)) {
    sscanf(input, "%d", &accuracytype);
    } else {
    printf ("Error! An invalid character was entered.\n");
    exit(1);
  }

  int playtime;
  printf ("\nHow long would you like to play for? Answer in seconds.\n");
  scanf ("%d", &playtime);

  int number_length;
  printf ("Please enter maximum possible number\n");
  scanf ("%d", & number_length);

  time_t unix_time;
  unix_time = time(NULL);
  int end_time = unix_time + playtime;

  int score = 0;
  int questioncount = 0;

  while (unix_time < end_time) {
    float num1 = rand() % number_length + 1;
    float num2 = rand() % number_length + 1;
    int type = rand() % 4 + 1;
    float result;
    float answer;
    char entered[20];

    // DEBUG
    //printf("%g, %g and %d\n", num1, num2, type);

    if (type == 1) {
      printf ("Add %g and %g\n", num1, num2);
      result = num1 + num2;
    } else if (type == 2) {
      printf ("Divide %g by %g\n", num1, num2);
      result = num1 / num2;
    } else if (type == 3) {
      printf ("Subtract %g from %g\n", num1, num2);
      result = num1 - num2;
    } else if (type == 4) {
      printf ("Multiply %g by %g\n", num1, num2);
      result = num1 * num2;
    }
    unix_time = time(NULL);
    questioncount++;

    scanf ("%s", entered);

    if (isvalidnumber(entered)) {
      sscanf (entered, "%g", &answer);
    } else {
      printf ("Error! An invalid character was entered.\n");
      exit (1);
    }

    if (result == answer) {
      printf ("Correct!\n");
      score++;
    } else {
      printf ("Incorrect! The correct answer is %g.\n", result);
    }

    // DEBUG
   // printf ("Result is %g\n", result);
  }

  float accuracy;

  accuracy = (float)score / questioncount * 100;

  printf ("Your score is %d!\n", score);
  if (score >= 1) {
    printf ("Great job, %s!\n", username);
  } else {
    printf ("Try again!, %s.\n", username);
  }
  if (accuracytype == 1) {
    printf ("You got an accuracy of %d%%!\n", (int)accuracy);
  } else {
    printf ("You got an accuracy of %g%%!\n", accuracy);
  }

  return 0;
}