#include <iostream>
//myFile_fgetpos2.cpp
// comparing printf and cout
//FILE of C with I/O of C++
//<cstdio> with <iostream>
// reading dynamic block vs preconceived streaming 
using namespace std;
void readfile(char *);
int main()
{
   FILE   *fp; fpos_t pos, pos1;
   char   buffer[100];
   char *filename= "Filegetpos1.txt";
   //
   cout<<"\n file conts with gets \n"; 
   readfile(filename); 
   cout<<endl; 
   //
   fp = fopen(filename, "rb");
   fgetpos(fp,&pos);
   pos1 =pos;
   fread( buffer, sizeof( char ),21, fp );
   //printf %.21s\n read a string with line break
   printf("printf reading buffer 21 \n  %.21s  ", buffer); 
   cout<<endl;
   cout<<"\n re-seting to begining wtih fsetpos \n";
    fsetpos(fp, &pos1); 
	fread( buffer, sizeof( char ),1, fp );
	printf("printf reading buffer 1 \n  %.1s  ", buffer);
	cout<<endl;
	cout<<"\n re-seting to begining wtih fsetpos \n";
	fsetpos(fp, &pos1);  
	fread( buffer, sizeof( char ),10, fp );
	printf("printf reading buffer 10 \n  %.10s  ", buffer);
	cout<<endl;
	//
	cout<<"\n re-seting to begining wtih fsetpos \n"; 
	fsetpos(fp, &pos1);  
	fread( buffer, sizeof( char ),20, fp );
	printf("printf reading buffer 20 \n  %.20s  ", buffer);
	cout<<endl;
	
	//
	fclose(fp);
  return 0;
}

void readfile(char *str1)
{
 FILE *fp;
 char str[128];
 // file open with read
 fp = fopen ( str1 , "r" );
 while(!feof(fp)) {
   if(fgets(str, 126, fp)) 
      cout<< str;
	  }
fclose(fp);
}