Program using switch statement - Accept day numbers and print the name of the day of the week

#include<iostream.h>
#include<conio.h>
void main()
{
int day;
clrscr();
cout<<"Enter number of week's day 1 - 7   ";
cin>>day;
switch(day)
{
    case1:cout<<"sunday";break;
    case2:cout<<"monday";break;
    case3:cout<<"tuesday";break;
    case4:cout<<"wednesday";break;
    case5:cout<<"thursday";break;
    case6:cout<<"friday";break;
    case7:cout<<"saturday";break;
    default:cout<<"invalid day number";
}
getch();
}