#include <stdlib.h>
#include <stdio.h>
#include <string.h> /* for strlen() */

#define NAME "GIGATHINK, INC."
#define ADDRESS "101 Megabuck Plaza"
#define PLACE "Megapolis, CA 94904"
#define WIDTH 40
#define SPACE ' '

void show_n_char(char ch, int num);
void center_string(char str[], int width);

int main(void)
{
    show_n_char('*', WIDTH);
    putchar('\n');

    center_string(NAME, WIDTH);
    putchar('\n');

    center_string(ADDRESS, WIDTH);
    putchar('\n');

    center_string(PLACE, WIDTH);
    putchar('\n');

    show_n_char('*', WIDTH);
    putchar('\n');

    return 0;
}

void show_n_char(char ch, int num)
{
    int count;

    for (count = 0; count < num; count++)
        putchar(ch);
}

void center_string(char str[], int width)
{
    int count, spaces = (width - strlen(str))/2;

    show_n_char(SPACE,spaces);
    count = 0;
    while (str[count] != '\0')
        putchar(str[count++]);
}