so, uh...

first.c

/*
  Name:       Artem Golovin
  Email:      agolo124@mtroyal.ca
  Course:     COMP 2655-001
  Instructor: ppospisil
  Assignment: 3
  Due Date:   October, 6th
  Source:     first.c
 */
#include <stdio.h>
#include <stdlib.h>

#define bool int
#define true 1
#define false 0

#define CR 13
#define LF 10
#define WIDTH 80
#define HEIGHT 24
#define DEBUG 1


int main() {

  char filename[256] = "data0.txt";
  char inChar;
  FILE *file;

  int maxStr = 0;
  int strLen = 0;
  int lineNum = 0;
  
  int cols = 0;
  int rows = 0;
  int colWidth = 0;
  int currentStrLen = 0;
  int spaces;

  int i, j, spaceCounter;

  if (!DEBUG) {
    do {
      inChar = (char) getchar();
      if (inChar != '\n') {
        filename[i] = inChar;
        i++;
      } else {
        filename[i] = '\0';
      }
    } while (inChar != '\n');
  }

  if (file = fopen(filename, "r")) {

    /* gets the maximum string from the file */
    while (!feof(file)) {
      inChar = (char) fgetc(file);
      if (inChar != '\n') {
        strLen++;
      }
      else {
        maxStr = strLen > maxStr ? strLen : maxStr;
        strLen = 0; /* we want to reset the char counter */
        lineNum++;  /* increase line num */
      }
    }

    if (lineNum != 0) {

      /* do calculations */
      
      colWidth = maxStr + 1;
      cols = WIDTH / colWidth;
      rows = lineNum / cols;

      if (DEBUG)
        printf("cols: %d\nrows: %d\nmaxStr: %d\n\n", cols, rows, maxStr);

      /* do loops */
      for (i = 0; i < rows; i++) {
        fseek(file, 0, SEEK_SET);
        while (!feof(file)) {
          inChar = (char) fgetc(file);

          if (inChar != '\n') {
            putchar(inChar);
            currentStrLen++; /* get length of current str */
          } 
          
          else {

            for (j = 0; j < rows; j++) {
              do {
                inChar = (char) fgetc(file);
              } while (inChar != '\n' && !feof(file));
            }

            /* print out separating whitespaces */
            spaces = colWidth - currentStrLen;
            for (spaceCounter = 0; spaceCounter < spaces; spaceCounter++)
              putchar(' ');

            currentStrLen = 0;
          }
        }
        putchar('\n');
      }

    } else {
      printf("Empty file\n");
    }

  } else {
    printf("File doesn't exist\n");
  }

}