#include <stdio.h>

double sentit(double i) /* rehellinen funktio ei tulosta eik„ kysy */
{
  return i*2.54;
}

int main(void)
{
  double inch,cm;
  inch = 10.0;       // y = sin(x);
  cm = sentit(inch);
  printf("%4.1lf tuumaa on %4.1lf cm\n",inch,cm);
  return 0;
}