Не компилируется программа

# include <iostream>
# include <iomanip>
# include <cmath>
# include <ctime>
using namespace std;
void main ()
{
    int login=0, pass=0;
    cout<<"\n\t\t Welcome to database of Rivne Regional Hospital \n \t_____________________________________________________________\n\n\t Enter your surname please:"<<endl;
    cin>>login;
    cout<<"\n\t Enter your password please:"<<endl;
    cin>>pass;
    char key;
    cout<<"\t Select a department:"<<endl;
    cout<<"\n 1 - Planned surgery\n";
    cout<<"\n 2 - Urgent surgery\n";
    cout<<"\n 3 - Purulent surgery\n";
    cout<<"\n 4 - Neurological department\n";
    cout<<"\n 5 - Pediatric department\n";
    cout<<"\n 6 - Gastroenterology department\n";
    cout<<"\n 7 - Infectious department\n";
    cout<<"\n 8 - Department of pathology of newborns\n";
    cout<<"\n 9 - Burning department\n";
    cout<<"\n 10 - Cardiology department\n";
    cout<<"\n 11 - Therapy department\n";
    cout<<"\n 12 - Ophthalmic department\n";
    cout<<"\n 13 - Intensive care unit\n";
    cout<<"\n 14 - Urology department\n";
    cout<<"\n 15 - Department of skin and venereal diseases \n";
    cin>>key;
    switch(key)
    {
    case  '1':      
        cout<<"New patient (a)"<<endl;
        break; 
    case  '2':    
            cout<<"New patient (a)"<<endl;
        break; 
    case  '3':  
        cout<<"New patient (a)"<<endl;
        break; 
    case  '4':      
        cout<<"New patient (a)"<<endl;
        break; 
    case  '5':    
        cout<<"New patient (a)"<<endl;
        break; 
    case  '6':  
        cout<<"New patient (a)"<<endl;
        break;
    case  '7':      
        cout<<"New patient (a)"<<endl;
        break; 
    case  '8':    
        cout<<"New patient (a)"<<endl;
        break; 
    case  '9':  
        cout<<"New patient (a)"<<endl;
        break; 
    case  '10':     
        cout<<"New patient (a)"<<endl;
        break; 
    case  '11':    
        cout<<"New patient (a)"<<endl;
        break; 
    case  '12':  
        cout<<"New patient (a)"<<endl;
        break; 
    case  '13':     
        cout<<"New patient (a)"<<endl;
        break; 
    case  '14':    
        cout<<"New patient (a)"<<endl;
        break; 
    case  '15':  
        cout<<"New patient (a)"<<endl;
        break; 
    default:
        cout<<"\nError!!! This operator isn't correct\n";
        break;
    }
 
}

    int key;
    cin>> key;
    switch(key)
    {
        case  1 :
            cout<<"\t New patient (a)\n"
                "\t Show pacents (b)\n";
            cin>>c;
            if(c=='a')
                struct patient{
    cout<<"\t Number of the card";
    cin>>your_birthday.day;
    cout<<"\t Date  of arrival to the hospital:";
    cin>>your_birthday.month;
    cout<<"\t Date  of leaving the hospital:";
    cin>>your_birthday.year;
    cout<<"\t Department, chamber:";
    cin>>your_birthday.weekday;
    cout<<"\t First name:";
    cin>>your_birthday.mon_name;
    };
            else if(c=='b')
                cout<<"Kawaii"<<endl;
            break;