//seek.cpp 
//Output and Input from the same file, seekp demo
#include "stdafx.h"
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
using namespace std;

void main(void)
{
	FILE* fp=fopen("C:\\temp\\tt.bin","w+b"); //read+write and binary
	                           
	if(fp==NULL){cout<<"File Error!\n"; getch(); return;}

	for(char i=1 ; i<11 ; i++) fwrite(&i,sizeof(char),1,fp); //write to file 1-10

	fseek(fp,5,0);   //read, increment, and write back the sixth byte
	char tmp;
	fread(&tmp,sizeof(char),1,fp);
	tmp++;
	fseek(fp,5,0);
	fwrite(&tmp,sizeof(char),1,fp);

	fseek(fp,0,0);  //print file
	cout<<endl;
	for(int i=1 ; i<11 ; i++) 
	{
		fread(&tmp,sizeof(char),1,fp);		
		cout<<(int)tmp<<" ";
	}

	getch();
}