header file basic question:

Question

//call.cpp
#include "add.h"
#include<iostream>

using namespace std;
int main()
{

cout<<addd(2,3);

return 0;
}
//add.cpp
#include "add.h"
#include<iostream>
using namespace std;

int addd(int a,int b)
return a+b;

//add.h
#ifndef ADD_H_
#define ADD_H_
using namespace std;
int addd(int a,int b);

#endif // ADD_H_
when i compile cal.cpp it give undefined behaviour of addd()
please help where i have done wrong

Answer 1

it is not working if i put curly braces

Answer 2

i put curly braces around return statement then i compile cal.cpp again but it says undefined reference to addd(int ,int)

Answer 3

int addd(int a,int b)
{ return a+b;
}

Answer 4

when i compile Add.h it says undefined reference to main

Answer 5

i am using codeblocks

Answer 6

ok thanks