Ok here's the complete code. It is supposed to read records from input and store them in a file called file.dat. Then it is supposed to arrange these records in ascending order, but the program hangs at line no. 66
Code:
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <strstream>
int main()
{
std::ofstream file;
file.open("file.dat",std::ios::trunc|std::ios::binary);
if(!file)
std::cout<<"unable to open for output";
struct record
{
char code[6];
char name[20];
int i;
};
record r;
int a = 0;
while(1)
{
std::cout<<"Record " << a + 1 << std::endl;
std::cout<<"Enter character code, name and an int \n";
fflush(stdin);
std::cin.getline(r.code,6);
std::cout.flush();
std::cin.getline(r.name,20);
std::cout.flush();
std::cin>>r.i;
std::cout.flush();
file.write((char *)&r,sizeof(r));
std::cout<<"\nAdd another (y\\n) : ";
char c;
std::cin>>c;
std::cout.flush();
if(c == 'n')
break;
a++;
std::cout<<'\n'<<'\n';
}
file.close();
std::fstream file1("file.dat",std::ios::in|std::ios::out|std::ios::binary);
if(!file1)
std::cout<<"unable to open file1";
else
{
if(a>0)
{ while(a)
{
file1.seekp(0);
for(int i = a; i>0;i--)
{
record r1;
file1.read((char *)&r,sizeof(r));
file1.read((char *)&r1,sizeof(r1));
if(r1.i < r.i)
{
file1.seekp(-(sizeof(r)*2),std::ios::cur);
file1.write((char *)&r1,sizeof(r));
file1.write((char *)&r,sizeof(r));
file1.seekg(-(sizeof(r)),std::ios::cur);
}
}
a--;
}
}
file1.close();
}
std::ifstream file2("file.dat",std::ios::binary);
if(!file2)
std::cout<<"unable to open file2";
else
while(1)
{
std::cout<<"\n\n";
file2.read((char *)&r,sizeof(r));
if(file2.eof())
break;
std::cout<<r.code<<'\t'<<r.name<<'\t'<<r.i;
}
}