http://poj.org/problem?id=1102

#include <stdio.h>

char isd(char ch)
{
	return ch >= 0 && ch < 10;
}

void print_lc(char size, char num[9]);

int main(void)
{
	int ch;
	char num[9];
	char size;

	while (1) {
		scanf("%hhd", &size);
		if (!size) break;

		while ((ch = getchar()) == ' ')  {}
		ungetc(ch, stdin);

		ch = 0;
		while (isd(num[ch++] = getchar() - '0')) {}
		num[--ch] = -1;

		print_lc(size, num);
	}

	return 0;
}

static char display[7][10] = {
	"- -- -----",	// upper
	"|   ||| ||",	// upper-left
	"|||||  |||",	// upper-right
	"  ----- --",	// mid
	"| |   | | ",	// bottom-left
	"|| |||||||",	// bottom-right
	"- -- -- --"	// bottom
};

static char line[90];

void print_lc(char size, char num[9])
{
	char s = size + 3;
	char i, j, k;

	line[s*i] = 0;

	// upper
	for (i=0; num[i] != -1; i++) {
		line[s*i] = ' ';
		line[s*i+size+1] = ' ';
		line[s*i+size+2] = ' ';
		for (j=1; j<=size; j++)
			line[s*i+j] = display[0][num[i]];
	}
	line[s*i-1] = 0;
	printf("%s\n", line);

	// upper-left/right
	for (i=0; num[i] != -1; i++) {
		line[s*i] = display[1][num[i]];
		line[s*i+size+1] = display[2][num[i]];
		line[s*i+size+2] = ' ';
		for (j=1; j<=size; j++)
			line[s*i+j] = ' ';
	}
	line[s*i-1] = 0;
	for (i=0; i<size; i++)
		printf("%s\n", line);
	
	// mid
	for (i=0; num[i] != -1; i++) {
		line[s*i] = ' ';
		line[s*i+size+1] = ' ';
		line[s*i+size+2] = ' ';
		for (j=1; j<=size; j++)
			line[s*i+j] = display[3][num[i]];
	}
	line[s*i-1] = 0;
	printf("%s\n", line);

	// bottom-left/right
	for (i=0; num[i] != -1; i++) {
		line[s*i] = display[4][num[i]];
		line[s*i+size+1] = display[5][num[i]];
		line[s*i+size+2] = ' ';
		for (j=1; j<=size; j++)
			line[s*i+j] = ' ';
	}
	line[s*i-1] = 0;
	for (i=0; i<size; i++)
		printf("%s\n", line);
	
	// bottom
	for (i=0; num[i] != -1; i++) {
		line[s*i] = ' ';
		line[s*i+size+1] = ' ';
		line[s*i+size+2] = ' ';
		for (j=1; j<=size; j++)
			line[s*i+j] = display[6][num[i]];
	}
	line[s*i-1] = 0;
	printf("%s\n\n", line);
}

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