18.6. Write a function that gets length and width of a rectangle and returns area.

#include<stdio.h>

#include<conio.h>
long RectArea(int l, int w)

{

return (long)l*w;

}
void main()

{
int length, width;
clrscr ();
printf ("Enter first number: ");
scanf("%d",&length):
printf ("Enter second number: ");
scanf ("&d", &width):
printf ("Area= %ld", RectArea(length, width)); 

getch ();
}