Thread: Unix problems

Hi everone I am new to C++ programming in Unix and have been getting some strange errors. I can compile this code fine in visual C++ on my windows machine, but when I try to compile on a unix machine I get these errors.

Undifined symbol
first reference in file

folowed by a bunch of
"std::basic_ifstream"
"std::.....
"std:... etc

Code:

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <cctype>

using namespace std;

int main ()
{

int wordcount = 0;
int letters = 0;
double average = 0;
char ch;
	ifstream infile;

	infile.open("a:wordy.txt");
	if (infile.fail( )) 
	{
	cout << "Input file opening failed.\n";
	system("pause");
	exit(1);
	}
}

any ideas?

The code compiles with some warnings and produces this output:

Code:

09:25 ~> g++ -Wall stupid.cpp
stupid.cpp: In function ‘int main()’:
stupid.cpp:11: warning: unused variable ‘wordcount’
stupid.cpp:12: warning: unused variable ‘letters’
stupid.cpp:13: warning: unused variable ‘average’
stupid.cpp:14: warning: unused variable ‘ch’
09:25 ~> ./a.out
Input file opening failed.
sh: pause: command not found
09:25 ~> touch "a:wordy.txt"
09:25 ~> ./a.out
09:25 ~>

hmm i will ask my roomate

Code:

[
Undefined                       first referenced
 symbol                             in file
std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned int) const/var/tmp//cc0zbedf.o
std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<<char, std::char_traits<char> >& (*)(std::basic_osstream<char, std::char_traits<char> >&))/var/tmp//cc0zbedf.o
std::cout                                                 /var/tmp//cc0zbedf.o
std::ios_base::Init::Init()                     /var/tmp//cc0zbedf.o
srd::ios_base::Init::Init()                     /var/tmp//cc0zbedf.o
_gxx_personality_v0                         /var/tmp//cc0zbedf.o
std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic ostream <char. std::char traits <char> >& ) /var/tmp//cc0zbedf.o
ld: fatal: Symbol referencing errors.   No output written to a.out
collect2: ld returned 1 exit status

sorry it took so long, cut and paste was not working either.

the command line looks like this

bash-3.00$ gcc workdamnit.cpp

Code:

infile.open("a:wordy.txt");

That isn't going to work either. Unix doesn't use drive letters.
Try

Code:

infile.open("wordy.txt");

Or

Code:

infile.open("/tmp/wordy.txt");

Thanks for all the help. I got it working now.