Type definition issue - c++

Question

i have a stucture:
template <class T> struct Array{
int days;
T * M;
Array( int size ) : days(size), M(new T[size])
{
}
~Array()
{
delete[] M;
}
};
void currentDay();
void add(int,int,Array &);
and a class:
class Expe {
private:
int hk; //HouseKeeping
int fo; //Food
int tr; //Transport
int cl; //Clothing
int tn; //TelNet
int ot; //Others
}
Class contructor is :
Expe::Expe() {
this->hk = hk;
this->fo = fo;
this->tr = tr;
this->cl = cl;
this->tn = tn;
this->ot = ot;
}
THE PROBLEM: in main function i can manipulate the structure with objects... using the setObj() function for example but when i try to define my functions in Controller or in Controller.h i get the fallowing error:
..\ListStruc.cpp:28:28: error: 'Array' is not a type
..\ListStruc.cpp: In function 'void add(int, int, int)':
..\ListStruc.cpp:31:4: error: request for member 'M' in 'A', which is of non-class type 'int'
EDIT:
void add(int cant, int tip,Array A){
//Adds to current day the amount to a specific type
A.M[currentDay]; // i try to use this object.
}

Answer 1

This declaration is incorrect:
void add(int,int,Array &);
Since Array is a class template, the add function needs to be a template as well:
template <class T>
void add(int,int,Array<T> &);
Additionally, your definition of the add function takes the parameter by value, while the declaration takes the parameter by reference.