101/fizzbuzz.cpp at master · atishbits/101 · GitHub

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//variable i starts with 3 (we can write a wrapper to call this function with
//i=3).
//TODO: the input array of strings could be invalid!
void patternStartEnd(const vector<string>& input, int i) {
  bool done = false;
  bool anymatch = false;
  int pos = 0;
  string curr;
  int start;
  while (!done) {
      if(i%3 == 0 && i%5 == 0) {
          curr = "fizzbuzz";
          //TODO: the if/else block below should be bundled into a single bool
          //needrecurr(..) function
          if(anymatch) {//we expect it to match
                       //else we need to recurr
              if(strcmp(curr, input[pos]) != 0)
                  patternStartEnd(input, i+1)
              else { //check end condition
                  if(pos == input.size() - 1) {
                      done = true;
                      cout << "[" << start << "," << i << "]" << endl;
                  }
                  pos++;
              }
           }
           else {
               if(strcmp(curr, input[pos]) == 0) {
                   start = i;
                   pos++;
                   anymatch = true;
               }
           }

      }
      else if(i%3 == 0) {
          curr = "fizz";
          if(anymatch) {//we expect it to match
                       //else we need to recurr
              if(strcmp(curr, input[pos]) != 0)
                  patternStartEnd(input, i+1)
              else { //check end condition
                  if(pos == input.size() - 1) {
                      done = true;
                      cout << "[" << start << "," << i << "]" << endl;
                  }
                  pos++;
              }
           }
           else {
               if(strcmp(curr, input[pos]) == 0) {
                   start = i;
                   pos++;
                   anymatch = true;
               }
           }
      }
      else if(i%5 == 0) {
          curr = "buzz";
          if(anymatch) {//we expect it to match
                       //else we need to recurr
              if(strcmp(curr, input[pos]) != 0)
                  patternStartEnd(input, i+1)
              else { //check end condition
                  if(pos == input.size() - 1) {
                      done = true;
                      cout << "[" << start << "," << i << "]" << endl;
                  }
                  pos++;
              }
           }
           else {
               if(strcmp(curr, input[pos]) == 0) {
                   start = i;
                   pos++;
                   anymatch = true;
               }
           }
      }
      i = i+1;
  }
}