Binary file

Question

Write a structure ,City ,for a record that contains a city name of 20 characters and its population.  The structure is used for a binary file processing.

Answer 1

in C++
_______
#include<iostream.h>
#include<fstream.h> //for handling files in cpp
#include<stdlib.h>
// structure goes here
struct City{
char city_name[20];
float population;
};

//main programs
void main()
{
ofstream fout;
// open file in output mode and binary
fout("file.dat",ios::out | ios::binary);
City c1;

//execute the below lines in a loop to get more input

gets(c1.city_name); // gets string input from user
cin>>c1.population; // gets population from user
fout.write((char*)&c1,sizeof(c1));

}