"counthi" - 1 õppematerjal

PPK(outdated)

if (!state) { temp1 += s.charAt(i); } else if (state) { temp2 += s.charAt(i);}} s = temp2 + temp1; System.out.println(s);}}  Recursion (mostly codingBat solutions) 1. Count the number of certain word in a string if(str.length() < 2) return 0; if(str.startsWith("hi")) return 1 + countHi(str.substring(1)); return countHi(str.substring(1)) ; } 2. Replace pi with 3.14 (hhhpihhh -> hhh3.14hhh) if(str.length()<2) return str; if(str.startsWith("pi")) return "3.14" + changePi(str.substring(2)); return str.charAt(0) + changePi(str.substring(1)); 4. Given a string, compute recursively a new string where all the adjacent chars are now separated by a "*". if(str.length()==1 || str.equals("")) return str;