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//Listing 14.08 Using Command-line Arguments
#include <fstream>
#include <iostream>
#include <cassert> // assert()
using namespace std;
typedef struct {
int x;
int y;
} Vector;
int main(int argc, char *argv[]) // returns 1 on error
{
if (argc != 2)
{
cout << "Usage: " << argv[0] << " <filename>" << endl;
return(1);
}
ofstream fout(argv[1], ios::binary);
assert( fout.is_open() ); // and check for success
Vector v = {5,12};
fout.write(reinterpret_cast<char*>(&v), sizeof v);
fout.close();
ifstream fin(argv[1], ios::binary); // establish connection,
assert( fin.is_open() ); // and check for success
Vector v2 = {3,4};
cout << "v2.x\t:\t" << v2.x << endl;
cout << "v2.y\t:\t" << v2.y << endl;
fin.read(reinterpret_cast<char*>(&v2), sizeof v2);
cout << "v2.x\t:\t" << v2.x << endl;
cout << "v2.y\t:\t" << v2.y << endl;
fin.close();
return 0;
}
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