C Program to print days of week using switch statement

#include
#include
void main()
{
char a;
clrscr();
printf("Enter any first character of day");
scanf("%c",&a);
switch(a)
{
case 'S':printf("Sunday");
break;
case 'm':printf("Monday");
break;
case 't':printf("Tuesday");
break;
case 'w':printf("Wednesday");
break;
case 'T':printf("Thursday");
break;
case 'f':printf("Friday");
break;
case 's':printf("Saturday");
break;
default :printf("Invalid case");
}
getch();
}