counting number of words using first_of() and first_not_of()

[a22asin]

Hi, im having trouble trying to count the number of word per line from a file using first_of() and first_not_of(). I am to assume that each word is separated by a space or a tab (\t). I have managed to get each line and count each line; but i have no idea how i would use the two codes to find and count each word per line. can u please help me by showing me how i would do it (im a visual learner). Thanks.

My Code so Far:

code:

#include <iostream> #include <fstream> #include <string> using namespace std; int main () {         string line;         int numLines = 0;         ifstream file ("horton.txt");         if (file.is_open()){                 while ( getline (file,line) ){                         ++numLines;                 }         file.close();         cout <<numLines<<endl;         }         else cout << "Unable to open file"; }