#include <iostream>
#include <fstream>
using namespace std;
int main(int argc, char *argv[])
{
if(argc!=2) {
cout << "usage: REVERSE <filename>\n";
return 1;
}
ifstream in(argv[1], ios::in | ios::binary);
if(!in) {
cout << "Cannot open input file.\n";
return 1;
}
char ch;
long i;
// go to end of file (less eof char)
in.seekg(0, ios::end);
i = (long) in.tellg(); // see how many bytes in file
i -= 2; // backup before eof
for( ;i>=0; i--) {
in.seekg(i, ios::beg);
in.get(ch);
cout << ch;
}
in.close();
return 0;
}
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