AOC_2022/4/tuer4.c

#include <stdio.h>

int numarr_to_int(char numarr[2], int tpos) {
  //printf("- D: %i; %i -\n", numarr[0]-'0', numarr[1]-'0'); //DEBUG
  if(tpos==0) { return (numarr[1] - '0'); }
  else { return (( (numarr[1] - '0') * 10 ) + (numarr[0] - '0')); }
}

void clear_num_arr(char numarr[2]) {
  numarr[0] = '0'; numarr[1] = '0';
}

int main() { //Hi. The input-file has to have an empty line at the end. Sorry.
  FILE *input_file = fopen("./input.txt", "r");; 
  fseek(input_file, 0, SEEK_END);
  int if_size = ftell(input_file);
  fseek(input_file, 0, SEEK_SET);
  char input[if_size];
  char c[1];
  int val_arr[4];
  int pos = 0;
  char tmp_num[2];
  int tmp_pos = 1;
  int fully = 0;
  int at_all = 0;
  
  do {
    c[0] = fgetc(input_file);
    
    if(c[0]=='-' || c[0]==',') {
      val_arr[pos] = numarr_to_int(tmp_num, tmp_pos);
      tmp_pos = 1;
      clear_num_arr(tmp_num);
      pos++;
      continue;
    }
    if(c[0]=='\n' || c[0]=='\r') {
      val_arr[pos] = numarr_to_int(tmp_num, tmp_pos);
      tmp_pos = 1;
      clear_num_arr(tmp_num);
      pos = 0;
      //printf("%i; %i; %i; %i\r\n", val_arr[0], val_arr[1], val_arr[2], val_arr[3]); //DEBUG
      if((val_arr[0]>=val_arr[2] && val_arr[1]<=val_arr[3]) || (val_arr[2]>=val_arr[0] && val_arr[3]<=val_arr[1])) fully++; 
      if((val_arr[1]>=val_arr[2] && val_arr[0]<=val_arr[3]) || (val_arr[3]>=val_arr[0] && val_arr[2]<=val_arr[1])) at_all++; 
      continue;
    }
      
    tmp_num[tmp_pos] = c[0];
    tmp_pos--;
  } 
  while(c[0] != (char)-1);
       
  printf("~UwU Twying c todayw, awwen't we master? *^w^* Hewe is youww wesult: UmU~ : %i\r\n", fully);
  printf("!OwO WHat wAs thAt MAstaww?!?! You wouwd like additioneww infowmatiown?!: UmU~ : %i\r\n", at_all);
  return 0;
}