more than one instance of overloaded function "DISPLAY" matches the argument list?

void DISPLAY(user u[],int Tuser);

struct user
{
    queue<float> time ;
    queue<string> purpse;
}users[5];

int main()
{
//codes
    DISPLAY(users,Tuser);//here is the problem
    return 0;
}
void DISPLAY(user u[], int Tuser)
{
    for (int i = 0; i < Tuser; i++)
    {
        while (!(u[i].purpse.empty()))
        {
            cout << u[i].purpse.front()<<"\n";
            u[i].purpse.pop();
        }
        cout << "\n";
        
        while (!(u[i].time.empty()))
        {
            cout << u[i].time.front()<<"\n";
            u[i].time.pop();
        }
        cout << "\n";
    }
    
}

>it say there is Error in line ==> DISPLAY(users,Tuser) which before line of return 0; What is the solution? Error (active) E0308 more than one instance of overloaded function "DISPLAY" matches the argument list: the image of problem