Help me to draw a hollow rectangle in C++!

Hi guys,
Again, I'm getting crazy with this. The problem is:I need to write a C++ program that draws a hollow rectangle, in which the width and the length will be inputted by users. I've tried, but with no luck. It always shows me a rectangle with the wrong length and width. Do you have any ideas about my code? Please help me with this. Thank you!!!

Code:

#include<stdio.h>
#include<conio.h>

void main(void)
{
	int d, r, i, m, n;
	printf("Enter length:");
	scanf("%d", &d);
	printf("Enter width:");
	scanf("%d", &r);
	for(i=1; i <= r; i++)
	{
		for(m=0; m<=r; m++)
		{
		printf(" ");
		}
		for(n=0; n<=d-m; n++)
		{
		if(n==0||n==d-m)
			printf("*");
		else if(i==r)
			printf("*");
		else
			printf(" ");
		}
	printf("\n");
	}
	getch();
}

what you wrote is no C++

This is C. Are you sure you don't mean C? Deciding which language you're going to use is a start.
Also, void main is not standard. Use int main.