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/*
** TABTRICKs.C - Demonstrates how to use printf() for columnar formatting
*/
#include <stdio.h>
#include <string.h>
#define putnum(i) putchar(i+'0')
void main() /* void main() is not standard C, but avoids warnings */
{
char *firstname[] = { "Aloysius", "Bob", "Dennis", NULL },
*lastname[] = { "Fuddrucker", "Stout", "Ritchie", NULL };
int score[] = { -10, 70, 200, 0 },
i, tabwidth;
printf("%15sStudent Name%30s\n\n", "", "Test Score");
for (i = 0; NULL != lastname[i]; ++i)
{
tabwidth = 36 /* spaces to tab */
-2 /* allow for ", " */
-strlen(lastname[i]); /* lastname space */
printf("%15s%s, %-*s%3d\n",
"", lastname[i], tabwidth, firstname[i], score[i]);
}
/* print a ruler to make things clearer */
puts("");
for (i = 0; i < 71; ++i)
{
if (i == 10 * (i / 10))
putnum(i / 10);
else putchar(' ');
}
puts("");
for (i = 0; i < 71; ++i)
putnum(i % 10);
}
/*
RESULTS:
Student Name Test Score
Fuddrucker, Aloysius -10
Stout, Bob 70
Ritchie, Dennis 200
0 1 2 3 4 5 6 7
01234567890123456789012345678901234567890123456789012345678901234567890
*/
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