c++ - Algorithm that counts character's doesn't count apostrophes -

this function of larger program. function figures out how many characters in alphanumeric word. weird thing is, counts apostrophes when running in xcode, not after compiling , running in terminal. suggestions?

#include <iostream> #include <iomanip> #include <ctype.h>  using namespace std;  int wordlength(); void displaytable(int wf[]);  int main() {     int wordfrequency[16]={0};     int templengthstorage=0;      templengthstorage=wordlength();      while (templengthstorage!=0)     {         if (templengthstorage==1)//skipping subscript 0 - not using             ++wordfrequency[1];          else if (templengthstorage==2)             ++wordfrequency[2];          else if (templengthstorage==3)             ++wordfrequency[3];          else if (templengthstorage==4)             ++wordfrequency[4];          else if (templengthstorage==5)             ++wordfrequency[5];          else if (templengthstorage==6)             ++wordfrequency[6];          else if (templengthstorage==7)             ++wordfrequency[7];          else if (templengthstorage==8)             ++wordfrequency[8];          else if (templengthstorage==9)             ++wordfrequency[9];          else if (templengthstorage==10)             ++wordfrequency[10];          else if (templengthstorage==11)             ++wordfrequency[11];          else if (templengthstorage==12)             ++wordfrequency[12];          else if (templengthstorage==13)             ++wordfrequency[13];          else if (templengthstorage==14)             ++wordfrequency[14];          else if (templengthstorage>=15)             ++wordfrequency[15];          templengthstorage=wordlength();     }      displaytable(wordfrequency); }  int wordlength() {     int lettercount=0;     int endofword=0;     char input;     char nextchar;      cin.get(input);      while (endofword!=1 && !cin.eof())     {         if (input==' ' || input=='\n' || input=='.' || input=='!' || input=='?'  || input==',')         {//do nothing if whitespace or punctuation, skips on them         }          else if (input=='-')         {             nextchar=cin.peek();              if ((isalpha(nextchar)) || (isnumber(nextchar)))//this includes hyphen in words have hyphens (refer funtion notes)                 ++lettercount;              if (nextchar=='\n')//for cases hyphen doesn't add word length (refer function notes)             {                 cin.get(input);//dont count , next character             }         }          else if (input=='\'')             ++lettercount;          else if ((isalpha(input)) || (isnumber(input)))         {             ++lettercount;              nextchar=cin.peek();              if (nextchar==' ' || nextchar=='\n' || nextchar=='.' || nextchar=='!' || nextchar=='?'  || nextchar==',' || nextchar==')')//included ) condition end words cases such (219)             {                 endofword=1;             }         }          cin.get(input);     }      return lettercount; }  void displaytable(int wf[]) {     int totalwords=0;     float totalletters=0;//made float float based masth later on when finding average     float average=0;      cout << endl;      cout << "word length                 frequency" << endl;     cout << "-----------                 ---------" << endl;      (int i=1; i<=15; ++i)     {         /*this portion of loop displays table*/          cout << "    ";         cout << setw(2) << i;         cout << "                          ";         cout << wf[i] << endl;          /*this portion of loop calculations needed find average word length*/          totalwords += wf[i];         totalletters += (i * wf[i]);     }      cout << "\ntotal words = " << totalwords << endl << endl;      cout << "total letters = " << totalletters << endl << endl;      average = totalletters/totalwords;      cout << "average word length: " << average << endl; } 

i used "ain't" in both situations, testing purposes.