C언어 업 앤 다운게임(Up and Down game) 숫자맞추기 게임

#include <stdio.h> 

#include <stdlib.h>

#include <time.h>

#define HIGHLOW 1000

#define INCLUDE 3

void odd_even(int random_number);     // 1

void higher_lower(int random_number); // 2

void fdself_number(int random_number);// 3

void inc_number(int random_number);   // 4

void fdlast_number(int random_number);// 5

int main() {

register int random_number, last_number = 0;

int answer, chance = 0, max = 15, cnt_inlcude = 0;

  //make random number;

  srand((unsigned)time(NULL));

  random_number = (rand() / 10000); // (0 ~ 32768 / 10)

printf("%d\n", random_number); // check the random_number;

  //printf("%d\n", last_number);   // check the last_number;

printf("Made a random positive number.\n");

printf("Your chance %d times, Good luck!\n", max);

puts("");

  printf("Pick a number : ");

  while (chance < max) {

  scanf("%d", &answer);

  max--;

  if (chance == max) {

    printf("\nYour chances ended! Try again please...\n");

    break;

  }

  if (random_number > answer) {

    printf("Higher than your pick.\n\n");

  }

  else {

  printf("Lower than your pick.\n\n");

  }

  //printing hint//

  if (max == 13) {

    printf("***************************************\n");

    higher_lower(random_number);

    printf("***************************************\n");

  }

  

  if(max == 10){

  //printf("***************************************\n");

  inc_number(random_number);

  //printf("***************************************\n");

  }

  

  if (max == 7) {

    printf("***************************************\n");

    odd_even(random_number);

    printf("***************************************\n");

  }

  if (max == 4) {

    printf("***************************************\n");

    fdlast_number(random_number);

    printf("***************************************\n");

  }

  //end printing hint//

  if (random_number != answer) {

    printf("You have %d chances!\n", max);

    printf("Retry... : ");

  }

  else {

    printf("Congratulation!! Your pick is correct number!!\n");

  }

  if (random_number == answer) {

    break;

  }

  }

}

////////////////distinction odd, even number////////////////

void odd_even(int random_number) {

if (random_number % 2 == 0) {

  printf("HINT: This is even number.\n");

  }

  else {

  printf("HINT: This is odd number.\n");

  }

}

////////////////distinction odd, even number end////////////////

////////////////distinction higher, lower than 1000////////////////

void higher_lower(int random_number) {

  if (random_number < HIGHLOW) {

  printf("HINT: This number lower than %d.\n", HIGHLOW);

  }

  else {

  printf("HINT: This number higher than %d.\n", HIGHLOW);

  }

}

////////////////distinction higher, lower than 1000 end////////////////

////////////////distinction prime////////////////

void fdself_number(int random_number) {

  register int prime, i, j;

  for (i = 2; i <= random_number; i++) {

  for (j = 2; j <= i; j++) {

    if (i == j) {

    prime = i;

    }

    else if (i % j == 0) {

    break;

    }

  }

  }

  if (prime == random_number) {

  printf("HINT: This is a self number.\n");

  }

  else {

printf("HINT: This is not self number.\n");

  }

}

////////////////distinction prime end////////////////

////////////////finding last number////////////////

void fdlast_number(int random_number) {

int last_number = 0;

  if (random_number >= 1000) {

  last_number = (((random_number % 1000) % 100) % 10);

  printf("HINT: This number's last number is %d.\n", last_number);

  }

  else if ((random_number < 999) && (0 < random_number)) {

  last_number = ((random_number % 100) % 10);

  printf("HINT:  This number's last number is %d.\n", last_number);

  }

}

////////////////end finding last number////////////////

////////////////including specific number////////////////

void inc_number(int random_number) {

int i, num[5] = { 0 };

  num[0] = random_number / 1000;

  num[1] = random_number % 1000 / 100;

  num[2] = random_number % 1000 % 100 / 10;

  num[3] = random_number % 1000 % 100 % 10 / 1;

  for (i = 0; i < 5; i++) {

  if (num[i] == INCLUDE) {

    printf("***************************************\n");

    printf("HINT : This number included %d. \n", INCLUDE);

    printf("***************************************\n");

break;

  }

  else if (num[i] != INCLUDE) {

    printf("***************************************\n");

    printf("HINT : This number not included %d. \n", INCLUDE);

    printf("***************************************\n");

break;

  }

  }

}