Help me. I'm new

Well I was trying to learn how to do switches in a program. I typed it all out and then when i went to compile it, it said that there was unidentified reference to 'boy1(void)' . It did that for boy2, and girl1. Anyway here is the program:

Code:

---

#include <iostream.h>
#include <stdlib.h>

int main()
{
    int input;
    int boy1();
    int boy2();
    int girl1();
    cout<<"Who is this?"<<endl;
    cout<<"1. Boy1"<<endl;
    cout<<"2. Boy2"<<endl;
    cout<<"3. Girl1"<<endl;
    cout<<"4. Exit"<<endl;
    cin>>input;
    switch (input)
  {         
  case 1: boy1();
        cout<<"He is 15 years old."<<endl;
        system("PAUSE");
            break;
  case 2: boy2();
        cout<<"He is 13 years old."<<endl;
        system("PAUSE");
        break;       
  case 3: girl1();
        cout<<"She is 10 years old."<<endl;
        system("PAUSE");
            break;
  case 4:
        return 0; 
  default:         
        cout<<"Error, bad input, quitting";       
  }
  return 0;
}

---

Please help me. I am new and I want to learn C++. Thank you.

>> int boy1();
>> int boy2();
>> int girl1();

Get rid of the brackets. They're making your compiler think that boy1, 2, and girl1 are all functions.

Thank you.
That worked perfectly.
Thank you, again.:D :D