RE: [Dev-C++] Newbie: Linker Errors

Reid

I'm not getting the same errors... My errors do not say a line number and
only appear as such:

[Linker error] undefined reference to `DigitalTime::DigitalTime()'
[Linker error] undefined reference to `operator>>(std::istream&,
DigitalTime&)' 
[Linker error] undefined reference to `DigitalTime::advance(int)' 
[Linker error] undefined reference to `operator==(DigitalTime const&,
DigitalTime const&)' 
[Linker error] undefined reference to `operator<<(std::ostream&, DigitalTime
const&)'
[Linker error] undefined reference to `DigitalTime::advance(int, int)' 

Here's my compiler log:

-------------------------------------------------------
Compiler: Default compiler
Executing  g++.exe...
g++.exe "C:\compile\main.cpp" -o "C:\compile\main.exe"
-I"C:\Dev-Cpp\include\c++"  -I"C:\Dev-Cpp\include\c++\mingw32"
-I"C:\Dev-Cpp\include\c++\backward"  -I"C:\Dev-Cpp\include"
-L"C:\Dev-Cpp\lib"
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x134):main.cpp:
undefined reference to `DigitalTime::DigitalTime()'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x143):main.cpp:
undefined reference to `DigitalTime::DigitalTime()'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x16c):main.cpp:
undefined reference to `operator>>(std::istream&, DigitalTime&)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x189):main.cpp:
undefined reference to `DigitalTime::advance(int)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x19c):main.cpp:
undefined reference to `operator==(DigitalTime const&, DigitalTime const&)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x1e2):main.cpp:
undefined reference to `operator<<(std::ostream&, DigitalTime const&)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x218):main.cpp:
undefined reference to `operator<<(std::ostream&, DigitalTime const&)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x234):main.cpp:
undefined reference to `DigitalTime::advance(int, int)'
C:\DOCUME~1\opackjo\LOCALS~1\Temp/ccEVaaaa.o(.text+0x261):main.cpp:
undefined reference to `operator<<(std::ostream&, DigitalTime const&)'
Execution terminated

-------------------------------------------------------

-----Original Message-----
From: Reid Thompson [mailto:Rei...@at...]
Sent: Tuesday, September 30, 2003 11:25 AM
To: Opacki, Joseph; dev...@li...
Subject: RE: [Dev-C++] Newbie: Linker Errors


if these are the messages you are getting:
compile.cpp: In member function `void DigitalTime::advance(int, int)':
compile.cpp:56: `hourAdded' undeclared (first use this function)
compile.cpp:56: (Each undeclared identifier is reported only once for
each 
   function it appears in.)
compile.cpp: In function `std::ostream& operator<<(std::ostream&, const 
   DigitalTime&)':
compile.cpp:63: `theOjbect' undeclared (first use this function)
compile.cpp: In function `std::istream& operator>>(std::istream&, 
   DigitalTime&)':
compile.cpp:73: `readHours' undeclared (first use this function)
compile.cpp: In function `void readHour(std::istream&, int&)':
compile.cpp:127: `thehour' undeclared (first use this function)
make.exe: *** [compile.o] Error 1 Execution terminated

Then you need to declare each of these missing values( or spell them as
they have been declared ).
    hour = (hour + hourAdded)%24; should hourAdded be hoursAdded per
void DigitalTime::advance(int hoursAdded, int minutesAdded)

if (theOjbect.minute < 10) -> as above spelling counts

readHours(ins, theObject.hour); -> ditto

readHours(ins, theObject.hour); -> ditto
reid




> -----Original Message-----
> From: Opacki, Joseph [mailto:Jos...@ng...] 
> Sent: Tuesday, September 30, 2003 10:17 AM
> To: 'dev...@li...'
> Subject: [Dev-C++] Newbie: Linker Errors
> 
> 
> I'm still learning so please be patient.
> 
> I am running into some problems.  I've defined my interface 
> file as "compile.h", my implementation file as "compile.cpp", 
> and my application file as "main.cpp".  The implementation 
> and application files both contain [ #include "compile.h" ].  
> However, when I try to compile my application file, I receive 
> numerous linker errors with undefined references to my class.
> 
> HELP!  
> 
> Am I not understanding the whole seperate file compilation?  
> Isn't the class interface and implementation files supposed 
> to be named the same and just with different extensions?  
> 
> I've attached all three files...thanks.
> 
> Joe <<compile.cpp>>  <<compile.h>>  <<main.cpp>> 
>