How to Read from .txt file & Write into .bin file w/o weird char at the end

[magicbeans]

I am trying to create a .bin file of records from a .txt file. Initially the records are stored in a text file and I want to Read from the .txt file and Write to the .bin file.

This is the C++ code. The result write exactly but it has funny-looking unwanted characters attached at the end of the .bin file. How do I fix it?

#include <iostream>
#include <fstream>
using namespace std;

struct details {
int id;
string name;
int age;
string address;
string sport;
};

const int SIZE=100;

int main( int argc, char* argv[]) {
if( argc!=3) {
cout<<"illegal \n";
system ("pause");
return 1;
}
details x[SIZE];

ofstream out( argv[1], ios::ate|ios::out|ios::binary);
ifstream in ( argv[2], ios::in |ios::binary);

if(!in) {
cout<<"Sorry no such file\n";
system ("pause");
return -1;
}

if(in.good()) {
while(!in.eof()) {
in.read( (char*)(&x), sizeof(details)*SIZE);
}
}
in.close();

out.write( (char*)(&x), sizeof(details)*SIZE);

out.close();
system("pause");
return 0;
}