C++读写二进制文件

 

代码

#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 ;
}