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Asked: 2026-05-10T16:50:00+00:00

I wrote a program in C with Ubuntu Linux and now I need to

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I wrote a program in C with Ubuntu Linux and now I need to port it over to a UNIX machine (or what I believe to be a UNIX box). It compiles fine on my Ubuntu with GCC but when I try to compile it with GCC on the UNIX box, it gives this error:

a.c: In function `goUpDir': a.c:44: parse error before `char' a.c:45: `newDir' undeclared (first use in this function) a.c:45: (Each undeclared identifier is reported only once a.c:45: for each function it appears in.) a.c: In function `goIntoDir': a.c:54: parse error before `char' a.c:57: `newDir' undeclared (first use in this function) a.c:57: `oldDir' undeclared (first use in this function)

The main problems seem to be the parse error before char (the others are related)

44  char newDir[50] = '';  54  char* oldDir = (char*)get_current_dir_name();

These are just simple C-style strings declarations. Is there a header file that I need to include to get it to work in UNIX?

P.S. what is the command to see what version of unix and which version of gcc you are using? Knowing this will allow me to be more specific in my question.

Thanks

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1 Answer

  1. If you are compiling pure C, variables must be declared on the beggining of the functions. I mention this because most people compile their C programs using C++ compilers, which offers then some resources not normally available to pure C compilers, the most common example being the // comment lines.

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