C++ examples for File Stream:Binary File
Binary input and output with integers
#include <fstream> #include <iostream> using namespace std; const int MAX = 100; //size of buffer int buff[MAX]; //buffer for integers int main()//w ww . j av a 2 s .co m { for(int j=0; j<MAX; j++) //fill buffer with data buff[j] = j; //(0, 1, 2, ...) //create output stream ofstream os("edata.dat", ios::binary); //write to it os.write( reinterpret_cast<char*>(buff), MAX*sizeof(int) ); os.close(); //must close it for(int j=0; j<MAX; j++) //erase buffer buff[j] = 0; //create input stream ifstream is("edata.dat", ios::binary); //read from it is.read( reinterpret_cast<char*>(buff), MAX*sizeof(int) ); for(int j=0; j<MAX; j++) //check data if( buff[j] != j ) { cerr << "Data is incorrect\n"; return 1; } cout << "Data is correct\n"; return 0; }