Hello.
2 source files main.cpp def.cpp
main.cpp:
def.cpp:Code:#include <iostream> using namespace std; extern const int a; int main() { cout << a << endl; }
Code:const int a = 4;
when I compile it like this:
g++ main.cpp def.cpp -c
g++ main.o def.o
I get this error:
main.o(.text+0x12b):main.cpp: undefined reference to `a'
collect2: ld returned 1 exit status
But when I remove the "const" from the extern and from the actual definition of the value, it works. Why is it so and how to avoid id?