关于在CCS5.4下，使用fopen、fwrite等函数的问题

你好  请参考下面代码

#include<stdio.h>

#define MODEGRAYBAR 0
#define MODEGRAY 1
#define MODEPHOTO1 2
#define MODEPHOTO2 3
#define MODEPHOTO3 4
#define MODEPHOTO4 5
#define MODEBLOCK 6
#define MODEINCLINE 7
#define MODEFPHOTO 8

#define GRAYBARLEVEL 16

void ReadImage(unsigned char *pImage,char *cFileName,int nWidth,int nHeight);

void InitImage(unsigned int nMode,unsigned char *pImage,int nWidth,int nHeight)
{
 int x,y,nWork,nWork1;
 unsigned char *pWork;
 int nPointx=nWidth/2;
 int nPointy=nHeight/2;
 
 switch ( nMode )
 {
  case MODEGRAYBAR:
   pWork=pImage; nWork=256/GRAYBARLEVEL; nWork1=nHeight/GRAYBARLEVEL;
   for ( y=0;y<nHeight;y++ )
   {
    for ( x=0;x<nWidth;x++,pWork++ )
    {
     (*pWork)=(y/nWork1)*nWork;
    }
   }
   break;
  case MODEGRAY:
   pWork=pImage;
   nWork1=nHeight-nPointy; nWork=nWork1*nWork1;
   nWork1=nWidth-nPointx; nWork+=(nWork1*nWork1);
   nWork/=256;
   for ( y=0;y<nHeight;y++ )
   {
    for ( x=0;x<nWidth;x++,pWork++ )
    {
     nWork1=(x-nPointx)*(x-nPointx)+(y-nPointy)*(y-nPointy);
     nWork1=255-nWork1/nWork;
     if ( nWork1<0 ) nWork1=0;
     else if ( nWork1>255 ) nWork1=255;
     (*pWork)=nWork1;
    }
   }
   break;
  case MODEPHOTO1:
   ReadImage(pImage,"..\\Sunplus1.bmp",nWidth,nHeight);
   break;
  case MODEPHOTO2:
   ReadImage(pImage,"..\\Sunplus2.bmp",nWidth,nHeight);
   break;
  case MODEPHOTO3:
   ReadImage(pImage,"..\\Sunplus3.bmp",nWidth,nHeight);
   break;
  case MODEPHOTO4:
   ReadImage(pImage,"..\\Sunplus4.bmp",nWidth,nHeight);
   break;
  default:
   break;
 }
}

void ReadImage(unsigned char *pImage,char *cFileName,int nWidth,int nHeight)
{
 int j;
 unsigned char *pWork;
 FILE *fp;

 if ( fp=fopen(cFileName,"rb" ) )
 {
  fseek(fp,1078L,SEEK_SET);
  pWork=pImage+(nHeight-1)*nWidth;
  for ( j=0;j<nHeight;j++,pWork-=nWidth )
   fread(pWork,nWidth,1,fp);
  fclose(fp);
 }
}