simplify this?

[markg]

#include <stdio.h>

void main()
{
	int matrix[100][100], n, k, l, bord, bord1, bord2, bord3, bord4;

	do{
		printf("Enter order of matrix between 1 and 100 \n");
		scanf("%d",&n);
	}while(n<1 || n>100);

	for(k=0;k<n;k++){
		printf("Enter values for Row %d\n",k);
		for(l=0;l<n;l++){
			printf("Enter values for row %d col %d\n",k,l);
			scanf("%d",&matrix[k][l]);
		}
	}
	bord=0;
	for(k=0;k<1;k++){
		for(l=0;l<n;++l){
			bord=bord+matrix[k][l];
		}
	}
	bord1=0;
	for(k=n-1;k<n;k++){
		for(l=0;l<n;++l){
			bord1=bord1+matrix[k][l];
		}
	}
	bord2=0;
	for(l=0;l<1;l++){
		for(k=0;k<n;k++){
			bord2=bord2+matrix[k][l];
		}
	}
	bord3=0;
	for(l=n-1;l<n;l++){
		for(k=0;k<n;k++){
			bord3=bord3+matrix[k][l];
		}
	}
	bord4=0;
	bord4=bord+bord1+bord2+bord3;
	printf("The sum of the border elements are: %d\n",bord4);
}

I'm supposed to make a square matrix n x n, and get the sum of all border elements. This program is what I came up with, it works well enough, I was just wondering if there was a way to use fewer iterative statements.