/*+-+-+-+-+-+ +-+-+-+-+-+*/
/*|h|e|l|l|o| |w|o|r|l|d|*/
/*+-+-+-+-+-+ +-+-+-+-+-+*/

#include <stdio.h>

int main(void) {

  // ask for a string
  char greeting[20];
  scanf("hello %s", greeting);

  // output strings
  printf("hello world\n");
  printf("This is a string %s\n", greeting);
  printf("this is a float %+5.2f\n", 3.14);
  printf("this is a float %+5.2f\n", -3.14);
  printf("this is a decimal %+d\n", 3);
  return 0;
}