Mailinglist Archive: opensuse-programming (47 mails)

[Regis FLORET <r.floret@xxxxxxxxxxx>]

The first time I try to compile your code (called test.cpp) with :

gcc -o test test.cpp 

a big link error occured.

I tryed :

gcc -o test test.cpp -lstdc++ 

Compiled fine and works fine (but I haven't enought space on my hd to
run it completly)



Le mer 13/10/2004 à 17:30, Charles Hicks a écrit :
> 	When I run the following program (did not write it) on a 32 bit machine it 
> will not compile and run correctly. However if I compile and run it on my 64 
> bit machine it works fine.  
> 
> 	Would appreciate any ideas on this, do you think this is a bug or is there a 
> problem with the compiler or the program?
> 
> Thanks for any help you can give!!
> 
> Charley
> 
> Program
> 
> #include <fstream>
> #include <iostream>
> #include <iomanip>
> using namespace std;
> 
> int main()
> {
>    unsigned long long kb = 1024;
>    unsigned long long mb = kb * kb;
>    unsigned long long gb = kb * mb;
>    unsigned long long four_gb = gb * 4;
>    long long ten_gb = gb * 10;
>    int write_count = four_gb / kb;
> 
>    cout << "kb:       " << kb
>         << "\nmb:       " << mb
>         << "\ngb:       " << gb
>         << "\nfour_gb:  " << four_gb
>         << "\nten_gb:   " << ten_gb
>         << endl;
> 
>    unsigned char* buf = new unsigned char[kb];
>    memset(buf, 0, kb);
> 
>    double total_writes = write_count;
>    double writes = 0;
>    ofstream os("big_file");
> 
>    cout << setiosflags(ios::fixed)
>         << setprecision(0);
> 
>    for (int i = 0; i < write_count; ++i)
>    {
>       os.write((char*)buf, kb);
> 
>       ++writes;
> 
>       cout << "\r"  << setw(3)
>            << (writes / total_writes * 100.0) << "%"
>            << flush;
>    }
> 
>    os.close();
> 
>    cout << "\r100%\nFinished..." << endl;
> 
>    // Open for reading and test seek.
>    ifstream is("big_file");
>    std::streampos pos = four_gb-1000; // Arbitary position.
>    is.seekg(pos);
>    std::streampos new_pos = is.tellg();
> 
>    if (pos == new_pos)
>    {
>       cout << "Seek to " << pos << " worked!" << endl;
>    }
>    else
>    {
>       cout << "Seek to " << pos << " failed!" << endl;
>    }
> 
>    is.close();
> 
>    return 0;
> }