Error while using static int for incremental record.

[Tarun Jha]

here in the code below i am trying to print the increment every time the same object is called, but it's giving error.

#include
using namespace std;

class Names{
int m;
static int count;
public:
void setcode(void){
m = ++count;
cout<

Error:

Quote:

/tmp/ccDcxr5a.o: In function Names::setcode()':
savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0xe): undefined reference toNames::count'
savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0x17): undefined reference to Names::count'
savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0x1d): undefined reference toNames::count'
collect2: error: ld returned 1 exit status

Thank you

[Lost User]

Tarun Jha wrote:

but it's giving error.

And we must guess what that error is, and where it occurs?

[Tarun Jha]

this is what compiler is showing:

Quote:

/tmp/ccDcxr5a.o: In function Names::setcode()':
savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0xe): undefined reference toNames::count' savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0x17): undefined reference to Names::count'
savinglistOfNames.cpp:(.text._ZN5Names7setcodeEv[_ZN5Names7setcodeEv]+0x1d): undefined reference toNames::count' collect2: error: ld returned 1 exit status

[Lost User]

You have declared the variable count in your Names class, but never defined it in your code. Add the following line after the class declaration:

int Names::count;

[CPallini]

:thumbsup: