Mega Code Archive
A file comparision utility
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#include <iostream>
#include <fstream>
using namespace std;
int main(int argc, char *argv[])
{
register int i;
int numread;
unsigned char buf1[1024], buf2[1024];
ifstream f1("file1", ios::in | ios::binary);
if(!f1) {
cout << "Cannot open first file.\n";
return 1;
}
ifstream f2("file2", ios::in | ios::binary);
if(!f2) {
cout << "Cannot open second file.\n";
return 1;
}
do {
f1.read((char *) buf1, sizeof buf1);
f2.read((char *) buf2, sizeof buf2);
if(f1.gcount() != f2.gcount()) {
cout << "Files are of differing sizes.\n";
f1.close();
f2.close();
return 0;
}
for(i=0; i<f1.gcount(); i++) {
if(buf1[i] != buf2[i]) {
cout << "Files differ.\n";
f1.close();
f2.close();
return 0;
}
}
} while(!f1.eof() && !f2.eof());
cout << "Files are the same.\n";
f1.close();
f2.close();
return 0;
}
Cannot open first file.
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