// file: my first program
//

#include <stdio.h>
#include <math.h>

int main(int argc, const char** argv) {

  float sum = 0;
  for(long i = 0; i < 10; i += 1) {
    sum += i;
    if ((long)sum == (long)28) {
      fprintf(stdout, "hello world: %f\n", sum);
    }
  }
}