程序代码：

#include<stdio.h>
#include<io.h>
#include<malloc.h>
#include<dos.h>

typedef struct BMP_file
{
      unsigned int bfType;
      unsigned long bfSize;
      unsigned int reserved1;
      unsigned int reserved2;
      unsigned long bfOffset;
}bitmapfile;

typedef struct BMP_info
{
      unsigned long biSize;
      unsigned long biWidth;
      unsigned long biHeight;
      unsigned int biPlanes;
      unsigned int biBitCount;
      unsigned long biCompression;
      unsigned long biSizeImage;
      unsigned long biXpolsPerMeter;
      unsigned long biYpolsPerMeter;
      unsigned long biClrUsed;
      unsigned long biClrImportant;
}bitmapinfo;

typedef struct RGB_BMP_typ
{
      unsigned char blue;
      unsigned char green;
      unsigned char red;
      unsigned char reserved;
}RGB_BMP,*RGB_BMP_ptr;

typedef struct bmp_picture_typ
{
      bitmapfile file;
      bitmapinfo info;
      RGB_BMP palette[256];
      char far *buffer;
}bmp_picture,*bmp_picture_ptr;

#define TRUE 1
#define FALSE 0
#define WIDTH 320
#define HEIGHT 200
#define PALETTE_MASK 0x3c6
#define PALETTE_REGISTER_WR 0x3c8
#define PALETTE_DATA 0x3c9
#define VGA 0x13
#define TXT 0x3

typedef int BOOL;

BOOL CheckBmp(bmp_picture_ptr);
BOOL bmpInit(bmp_picture_ptr );
void bmpShow(bmp_picture_ptr );
void SetPalette(int,RGB_BMP_ptr);
void SetVideoMod(int);
void videoCopy(char far*,char *,int);

char far *videoBuf=(char far*)0xa0000000;

int main(void)
{
      FILE *fp;
      bmp_picture bmp;
      int i;
      unsigned char buf[WIDTH];

      fp=fopen("a.bmp","rb");
      SetVideoMod(VGA);

      if(fp==NULL)
      {
            printf("Can't Open File\n");
            getch();
            return 0;
      }
      /*read((int)fp,(char*)bmp.file,sizeof(bitmapfile));
      read(fp,bmp.info,sizeof(bitmapinfo)); */
      fread((char*)&bmp.file,sizeof(bitmapfile),1,fp);
      fread((char*)&bmp.info,sizeof(bitmapinfo),1,fp);

      for(i=0;i<256;++i)
      {
            /*read(fp,bmp.palette[i].blue,1);
            read(fp,bmp.palette[i].green,1);
            read(fp,bmp.palette[i].red,1);
            read(fp,bmp.palette[i].reserved,1);*/
            fread((char*)&bmp.palette[i].blue,1,1,fp);
            fread((char*)&bmp.palette[i].green,1,1,fp);
            fread((char*)&bmp.palette[i].red,1,1,fp);
            fread((char*)&bmp.palette[i].reserved,1,1,fp);

            bmp.palette[i].blue>>=2;
            bmp.palette[i].green>>=2;
            bmp.palette[i].red>>=2;
      }

     if(!CheckBmp(&bmp))
            return 0;

      /*if(!bmpInit(&bmp))
            return 0; */

      for(i=0;i<256;++i)
            SetPalette(i,(RGB_BMP_ptr)&bmp.palette[i]);

     

      for(i=HEIGHT-1;i>=0;i--)
      {
            fseek(fp,1078+(long)(HEIGHT-1-i)*WIDTH,SEEK_SET);
            /*fread((char*)&bmp.buffer[i*WIDTH],WIDTH,1,fp);*/
            fread(buf,WIDTH,1,fp);
            /*memcpy(videoBuf[i*WIDTH],buf,WIDTH);*/
            videoCopy(videoBuf+i*WIDTH,buf,WIDTH);
      }

      /*for(i=0;i<256;++i)
            videoBuf[i+100]=i; */
      /*bmpShow((bmp_picture_ptr)&bmp); */
      fclose(fp);
      getch();
      /*free(bmp.buffer);*/
      SetVideoMod(TXT);
      getch();
      return 0;
}

BOOL CheckBmp(bmp_picture_ptr bmp)
{
      if(bmp->file.bfType!=0x4d42)
      {
            printf("Not a Bmp File!\n");
            getch();
            return FALSE;
      }

      if(bmp->info.biCompression!=0)
      {
            printf("Can't Display a Compression Bmp!\n");
            getch();
            return FALSE;
      }

      if(bmp->info.biBitCount!=8)
      {
            printf("Not a index 16 color bmp!\n");
            getch();
            return FALSE;
      }
      return TRUE;
}

BOOL bmpInit(bmp_picture_ptr bmp)
{
      unsigned int a=(unsigned int)(WIDTH*HEIGHT+1);

      if((bmp->buffer=(char far *)malloc(a))==NULL)
      {
            printf("Can't allocate a memory!\n");
            getch();
            return FALSE;
      }
      return TRUE;
}

void bmpShow(bmp_picture_ptr bmp)
{
      memcpy((char far*)videoBuf,(char far*)bmp->buffer,
            (unsigned int)WIDTH*HEIGHT/2);
}

void SetPalette(int index,RGB_BMP_ptr color)
{
      outp(PALETTE_MASK,0xff);
      outp(PALETTE_REGISTER_WR,index);
      outp(PALETTE_DATA,color->red);
      outp(PALETTE_DATA,color->green);
      outp(PALETTE_DATA,color->blue);
}

void SetVideoMod(int mode)
{
      union REGS in,out;

      in.h.ah=0;
      in.h.al=(unsigned char)mode;
      int86(0x10,&in,&out);
}

void videoCopy(char far *dest,char *buf,int size)
{
      int i;

      for(i=0;i<size;++i)
            *(dest+i)=*(buf+i);
}

程序代码：

void videoCopy(char far *dest,char *buf,int size)
{
      int i;

      for(i=0;i<size;++i)
            *(dest+i)=*(buf+size-1-i);
}