C++读写二进制文件

 

#include "stdafx.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#define  MAXLEN 1024
void Fill0(char t[])
{
    
    if(strlen(t)<2)
    {
        t[1]=t[0];
        t[0]='0';
        t[2]=0;
    }
}
int   binaryToString(char *from,char *to)   
  {   
          FILE *fp;
      FILE *out;
     
      fp=fopen(from,"rb");
      out=fopen(to,"w");
      if(!fp||!out){
            printf("error!\n");
            return -1;
      }
      unsigned char c;
      int count;

    char cc[2];
    int size=0;
      while((count=fread(&c, 1, 1, fp)) == 1)
      {
        
        
        sprintf(cc,"%x",c); 
        Fill0(cc);
    
        
        fwrite(cc,1,2,out);

            size++;
        
      }
      printf("total:%d",size);
          fclose(out);
          fclose(fp);
          return   0;   
  }   
int stringToBinary(char *from,char *to)
{
        FILE *fp;
      FILE *out;

      fp=fopen(from,"r");
      out=fopen(to,"wb");
      if(!fp||!out){
            printf("error!\n");
            return -1;
      }
      
      int count;

    char cc[2];
    int size=0;
    int d=0;
      while((count=fread(cc, 1, 2, fp)) == 2)
      {
    
            sscanf(cc,"%2x",&d); 

    
        fwrite(&d,1,1,out);
    
            size++;
        
      }
      printf("total:%d",size);
          fclose(out);
          fclose(fp);
          return   0;   
}


int main(int argc,char* argv[])
{
    
    if(argc!=4)
    {
        printf("cmd -tos|tob <srcFile> <destFile>\n");
        getchar();
        return -1;
    }
    if(strcmp(argv[1],"tos")==0)
    {
        binaryToString(argv[2],argv[3]);
    }
    else if(strcmp(argv[1],"tob")==0)
    {
        stringToBinary(argv[2],argv[3]);
    }
    return 1;
}