C 언어 코딩 도장

unit 81 심사문제, 집에서는 잘 되는데 왜 통과 못하는지 잘 모르겠어요.

아래는 소스 입니다.

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>

#pragma pack(push, 1)

typedef struct _BITMAPFILEHEADER {
 unsigned short bfType;
 unsigned int bfSize;
 unsigned short bfReserved1;
 unsigned short bfReserved2;
 unsigned int bfOffBits;
} BITMAPFILEHEADER;

typedef struct _BITMAPINFOHEADER {
 unsigned int biSize;
 int biWidth;
 int biHeight;
 unsigned short biPlanes;
 unsigned short biBitCount;
 unsigned int biCompression;
 unsigned int biSizeImage;
 int biXPersPerMeter;
 int biYPersPerMeter;
 unsigned int biClrUsed;
 unsigned int biClrImprotant;
} BITMAPINFOHEADER;

typedef struct _RGBTRIPLE {
 unsigned char rgbtBlue;
 unsigned char rgbtGreen;
 unsigned char rgbtRed;
} RGBTRIPLE;

#pragma pack(pop)

#define PIXEL_SIZE 3
#define PIXEL_ALIGN 4

int main()
{
 FILE* fpBmp;
 FILE* fpTxt;
 BITMAPFILEHEADER fileHeader;
 BITMAPINFOHEADER infoHeader;

 unsigned char* image;
 int size;
 int width, height;
 int padding;

 char ascii[] = { '9','8', '7', '6', '5', '4', '3', '2', '1', '0', ' ' };

 fpBmp = fopen("sample.bmp", "rb");
 if (fpBmp == NULL)
  return 0;

 if (fread(&fileHeader, sizeof(BITMAPFILEHEADER), 1, fpBmp) < 1)
 {
  fclose(fpBmp);
  return 0;
 }

 if (fileHeader.bfType != 'MB')
 {
  fclose(fpBmp);
  return 0;
 }

 if (fread(&infoHeader, sizeof(BITMAPINFOHEADER), 1, fpBmp) < 1)
 {
  fclose(fpBmp);
  return 0;
 }

 if (infoHeader.biBitCount != 24)
 {
  fclose(fpBmp);
  return 0;
 }

 size = infoHeader.biSizeImage;
 width = infoHeader.biWidth;
 height = infoHeader.biHeight;

 padding = (PIXEL_ALIGN - (width * PIXEL_SIZE) % PIXEL_ALIGN) % PIXEL_ALIGN;

 if (size == 0)
 {
  size = (width * PIXEL_ALIGN + padding) * height;
 }

 image = malloc(size);

 fseek(fpBmp, fileHeader.bfOffBits, SEEK_SET);

 if (fread(image, size, 1, fpBmp) < 1)
 {
  fclose(fpBmp);
  return 0;
 }

 fclose(fpBmp);

 //fpTxt = fopen("sample.txt", "w");
 fpTxt = stdout;
 if (fpTxt == NULL)
 {
  free(image);
  return 0;
 }

 for (int y = height - 1; y >= 0; y--)
 {
  for (int x = 0; x < width; x++)
  {
   int index = (x * PIXEL_SIZE) + (y * (width * PIXEL_SIZE)) + (padding * y);

   RGBTRIPLE* pixel = (RGBTRIPLE*)&image[index];

   unsigned char blue = pixel->rgbtBlue;
   unsigned char green = pixel->rgbtGreen;
   unsigned char red = pixel->rgbtRed;

   unsigned char gray = (red + green + blue) / PIXEL_SIZE;

   char c = ascii[gray * sizeof(ascii) / 256];

   fprintf(fpTxt, "%c", c);
  }
  fprintf(fpTxt, "\n");
 }

 fclose(fpTxt);

 free(image);

 return 0;
}