bar chart (histogram)
#include <stdio.h>
#define SIZE 10

int main()
{
int n[ SIZE ] = { 19, 3, 15, 7, 11, 9, 13, 5, 17, 1 };
int i, j;

printf( "%s%13s%17s\n", "Element", "Value", "Histogram" );

for ( i = 0; i <= SIZE - 1; i++ ) {
printf( "%7d%13d ", i, n[ i ]) ;

for ( j = 1; j <= n[ i ]; j++ ) /* print one bar */
printf( "%c", '*' );

printf( "\n" );
}

return 0;
}