text: /*
  cc cleanfile.c -o cleanfile
  */
  
  #include <stdio.h>
  #include <sys/types.h>
  
  
  int main(int argc, char *argv[])
  {
  unsigned int	a,b=0;
  FILE		*fp_in=NULL,*fp_out=NULL;
  long		FileL,ctr;
  
  	if(argc>1)
  	{
  		if((fp_in=fopen(argv[1],"r"))!=NULL)
  		{
  			fseek(fp_in,0L,SEEK_END);
  			FileL=ftell(fp_in);
  			fseek(fp_in,0L,SEEK_SET);	
  		}
  		if(argv[2]!=NULL)
  		{
  			if(argv[2][0]!='\0')
  			{
  				sscanf(argv[2],"%u",&b);
  			}
  		}
  	}
  	else
  	{
  		printf("Need a source file...");fflush(stdout);
  		return(1);
  	}
  
  	printf("\nCutting first %d bytes...",b);fflush(stdout);
  
  	if((fp_out=fopen("out.txt","w"))==NULL)
  	{
  		fclose(fp_in);
  		printf("\nPRC WRITE : Can not open 'out.txt' for writing...");fflush(stdout);
  		return(1);
  	}
  
  	for(ctr=0;ctr<FileL;ctr++)
  	{
  		a=fgetc(fp_in);
  		if((a!=0)&&(a!=' ')&&(ctr>=b))
  		{
  			if((a<' ')&&(a>126)) a='.';
  			if(a==0x0d) a=0x0a;
  			fputc(a,fp_out);
  		}
  	}
  
  	fflush(fp_out);
  	fclose(fp_out);
  	fclose(fp_in);
  
  return(0);
  }
  