Completely wrong list to ask. This appears to be a lesson from an instructor.
BTW, you are missing something glaringly wrong.
On Mon, 2007-02-19 at 20:27 +0200, ccostin wrote:
> What's wrong with the followind C++ code ?
>
> $ cat file1.cc
> #include "file.hh"
> void f1(int x,int y, int z)
> {
> a=x;
> b=y;
> c=z;
> }
>
> $ cat file2.cc
> #include "file.hh"
> void f2(int x,int y, int z)
> {
> a=x;
> b=y;
> c=z;
> }
>
> $ cat file.hh
> #ifndef _FIS_H_
> #define _FIS_H_
> int a,b,c;
> void f1(int x,int y, int z);
> void f2(int x,int y, int z);
> #endif
>
> $ cat mult.cc
> #include <stdio.h>
> #include "file.hh"
>
> int main(int argc, char **argv)
> {
> f1(2,4,5);
> f2(-4,-6,-7);
> }
>
> At compilation some unexepected errors appear:
>
> g++ -g3 -Wall mult.cc file1.cc file2.cc file.hh -o mult
>
> /tmp/cchljRii.o: In function `f1(int, int, int)':
> /home/dmu/progs/file1.cc:2: multiple definition of `a'
> /tmp/ccoyolKs.o:/home/dmu/progs/mult.cc:4: first defined here
> /tmp/cchljRii.o: In function `f1(int, int, int)':
> /home/dmu/progs/file1.cc:4: multiple definition of `b'
> /tmp/ccoyolKs.o:/home/dmu/progs/mult.cc:4: first defined here
> /tmp/cchljRii.o: In function `f1(int, int, int)':
> /home/dmu/progs/file1.cc:4: multiple definition of `c'
> /tmp/ccoyolKs.o:/home/dmu/progs/mult.cc:4: first defined here
> /tmp/ccSKsyP8.o: In function `f2(int, int, int)':
> /home/dmu/progs//file2.cc:2: multiple definition of `a'
> /tmp/ccoyolKs.o:/home/dmu/progs//mult.cc:4: first defined here
> /tmp/ccSKsyP8.o: In function `f2(int, int, int)':
> /home/dmu/progs/file2.cc:4: multiple definition of `b'
> /tmp/ccoyolKs.o:/home/dmu/progs/mult.cc:4: first defined here
> /tmp/ccSKsyP8.o: In function `f2(int, int, int)':
> /home/dmu/progs/file2.cc:4: multiple definition of `c'
> /tmp/ccoyolKs.o:/home/dmu/progs/mult.cc:4: first defined here
> collect2: ld returned 1 exit status
>
> preprocessor directives doesn't seem to work at all (#ifndef _FIS_H_
> /#define _FIS_H_):
>
> $g++ -g3 -Wall mult.cc file1.cc file2.cc file.hh -E | grep "void
> f1(int x,int y, int z);"
> void f1(int x,int y, int z);
> void f1(int x,int y, int z);
> void f1(int x,int y, int z);
> void f1(int x,int y, int z);
>
> $g++ -g3 -Wall mult.cc file1.cc file2.cc file.hh -E | grep "int a,b,c"
> int a,b,c;
> int a,b,c;
> int a,b,c;
> int a,b,c;
>
> Functions/variables declarations (declared in file.h) appear 4 times
> in g++ preprocessor output, not one.
>
> Same files, in C variant (using .c and .h file extensions) are
> compiled (using gcc) without any error or warning.
>
>
--
greg, [EMAIL PROTECTED]
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