Stuff

#include <stdio.h>

double
convert (int a)
{
	double u;

	u = (a - 32) * (5.0 / 9.0);
	return u;
}

int
main (void)
{
	int f;

	for (f = 0; f <= 300; f += 20)
		printf ("%3d %6.1f\n", f, convert (f));

	return 0;
}