Thread: Multi - File Program not finding files

I am working on a databse type program now, and I am still pretty new, so it is my first multi file program I've written. The problem is I have variables, arrays and functions that are defined within one .cpp file that we'll call file2. I have also created a file2.h, and include it in the preprocessor directives at the beginning of my main program file, we'll call file1.cpp. However, every time I try to display a variable that was defined in file2, it won't work. It says,

error C2065: 'bookTitle' : undeclared identifier
error C2109: subscript requires array or pointer type

It's like its not reading the other files to the program. Is there something I need to do to link them together? Please help!

When you do this, you need to set up your code like so:

file2.cpp

Code:

 int var1;
 int var2;
 float var3;
 
 int myFunc(int pass1,int pass2)
 {
 	 return pass1+pass2;
 }

file2.h

Code:

 #ifndef FILE2_H_
 #define FILE2_H_
 
 extern int var1;
 extern int var2;
 extern float var3;
 int myFunc(int pass1,int pass2);
 
 #endif

file.cpp

Code:

 #include "file2.h"
 #include <iostream.h>
 
 int main()
 {
 	 var1=3;
 	 var2=5;
 	 cout << myFunc(var1,var2) << endl;
 	 cout << "var3==" << var3 << endl;
 
 	 return 0;
 }

So you basically have a triangle setup for your code:

Code:

 	  file2.h
 	   /	 \
 	file.cpp  file2.cpp

-hope that helps