Constants,Variables and Data Types

Program to show typical declarations, assignments and values stored in various types of variables.
#include<stdio.h>
void main()
{

float x, p ;
double y, q ;
unsigned k ;
int m = 54321 ;
long int n = 1234567890 ;
x = 1.234567890000 ;
y = 9.87654321 ;
k = 54321 ;
p = q = 1.0 ;
printf("m = %d\n", m) ;
printf("n = %ld\n", n) ;
printf("x = %.12lf\n", x) ;
printf("x = %f\n", x) ;
printf("y = %.12lf\n",y) ;
printf("y = %lf\n", y) ;
printf("k = %u p = %f q = %.12lf\n", k, p, q) ;
getch();
}