Debugging C++ file - c++

Question

I am getting this error main.cpp:23:5: error: ‘Department’ does not name a type
/*
* File: main.cpp
* Author: anonymous
*
* Created on May 11, 2015, 9:44 PM
*/
#include <cstdlib>
#include <iostream>
using namespace std;
class College{
public :
string name; //for name of the college
int numOfColleges;
int numDepartments; //number of departments in this college
Department* dep; //this will point to the department in this college
College* next; //the next pointer to point to the next college
College(){
name =" ";
numDepartments=0 ;
dep = NULL;
next=NULL;}
College (string n, int numD ){name=n ;next=NULL;}
void Print(){
cout<<name<<"\n";
}
};
class Department
{
public:
string name;
int numOfStudents;
Department* next;
Department(){name[0] ; numOfStudents=0 ; next=NULL ;}
Department( string n , int numS){ name =" "; n ;numOfStudents = numS ; next=NULL;}
void Print(){cout<<name<<" "<<numOfStudents;}
};
void AddCollege(College *head)
{
string n;
int numD;
cout<<"Enter the name of the College : ";
cin>>n;
cout<<"Enter the number of Departments : ";
cin>>numD;
College* tmp = new College(n,numD);
if(!head)
{
head=tmp;
return;
}
College * t=head;
while(t->next) t=t->next;
t->next=tmp;
cout<<"college added";
}
void DeleteCollege(College*&head)
{
string name;
cout<<"enter name of college:";
cin>>name;
if((!head)||(!head->next && head->name!=name))
{
cout<<"could not find "<<name<<" in the list\n"; return;
}
if(head->next && head->name==name)
{
College *tmp=head;
head=head->next;
delete tmp;
tmp=NULL;
return;
}
College* tmp = head;
College* t;
while(tmp->next)
{
if(tmp->name==name)
{
College* tmp = head;
head = head->next;
delete tmp;
tmp->next=NULL;
}
if(tmp->next->name == name)
{
t = tmp->next;
tmp->next = tmp->next->next;
delete t;
return;
}
tmp=tmp->next;
}
cout<<"could not find "<<name<<" in the list\n";
};
/*Print the list of colleges int the college head*/
void printColleges(College *head)
{
cout<<"ALL Colleges in Database : \n";
College * temp = head;
while(temp!=NULL)
{
temp->Print();
temp=temp->next;
}
}
void AddDepartment(College *head)
{
if(!head)
{
cout<<"NO COLLEGES ADDED!!";
return;
}
string n,Dname;
int numS;
College* tmp = head;
College*tmp2 = tmp;
;
while(tmp)
{
cout<<"->"<<tmp->name;
tmp=tmp->next;
cout<<endl;
}
cout<<"Type a College name to Add a Department inside\n";
cin>>n;
cout<<"Enter Department name:";
cin>>Dname;
cout<<"Enter the number of students :";
cin>>numS;
while(n!=tmp->name)
{
tmp=tmp->next;
}
if(!tmp-> dep)
{
College * tmpD = new Department(Dname,numS);
Department*tmpDD = tmpD;
head=tmp;
return;
}
/*if(tmp->dep)
{
Department *tmp3 = tmp->dep->next;
t=tmp->dep;
dep->next=tmp3;
}*/
};
//void DeleteDepartment(College* head)
//{
//
//
// ;}
void PrintAll(College*head)
{
College * temp = head;
while(temp!=NULL)
{
temp->Print();
temp=temp->next;
}
};
int main(int argc, char** argv) {
int choice;
College*h = NULL;
while(choice!=11){
cout<<"\n\nMenu\n";
cout<<"1: Add a new college in the list  \n";
cout<<"2: Delete a college from the list \n";
cout<<"3: Add a department in a college\n";
cout<<"4: Delete a department from a college.\n";
cout<<"5: Print all the colleges along with their departments\n ";
cout<<"6: Delete all the departments of a particular college \n";
cout<<"7: Delete all the colleges from the list.\n";
cout<<"8: Print the total number of students in a college.\n";
cout<<"9: Find and print the college that has the highest number of students. \n";
cout<<"10: Find and print the department that has the highest number of students.\n";
cout<<"EXIT\n";
cin>>choice;
switch(choice)
{
case 1: AddCollege(*&h);
break;
case 2: DeleteCollege(*&h);
break;
case 3: printColleges(*&h);
break;
case 4:
AddDepartment(*&h);
break;
/* case 4:
DeleteDepartment(*&h);
break;
case 5:
PrintAll(*&h);
break;
case 6:
DeleteDepartment(*&h);
break;
case 7:
DeleteAllColleges(*&h);
break;
case 8:
NumOfStudentsInCollege(*&h);
break;
case 9:
HighestNumOfStudentsInCollege(*&h);
  break;
case 10:
HighestNumOfStudentsInDep(*&h);
break;
case 11:
cout<<"bye";
break;*/
default:
cout<<"\nInvalid menu choice";
}
}
}

Answer 1

Declare your Department class before it's called in College. (Move your Department declaration above your College declaration):
class Department
{
public:
string name;
int numOfStudents;
Department* next;
Department(){name[0] ; numOfStudents=0 ; next=NULL ;}
Department( string n , int numS){ name =" "; n ;numOfStudents = numS ; next=NULL;}
void Print(){cout<<name<<" "<<numOfStudents;}
};
class College{
public :
string name; //for name of the college
int numOfColleges;
int numDepartments; //number of departments in this college
Department * dep; //this will point to the department in this college
College * next; //the next pointer to point to the next college
College(){
name =" ";
numDepartments=0 ;
dep = NULL;
next=NULL;}
College (string n, int numD ){name=n ;next=NULL;}
void Print(){
cout<<name<<"\n";
}
};