WEEK:8 PROGRAMMING ASSIGNMENT 1 SOLUTION (Jan 2020-Apr2020) An Introduction to Programming through C++ NPTEL 2020

  

               An Introduction To Programming Through C++

IIT Bombay.

Week 8- Programming Assignment 1:

Given below is a main program that reads a line from the keyboard and

prints the number of words in it.  For this it calls a function words() which really does the work.  You are to write the function words() and enter that into the text box.  The main program is already entered.

A "word" is a (contiguous) sequence of non space characters which is maximal, i.e. it cannot be extended on either side. So as an example, if the character string is "He came, he   saw, he conquered."  then the words are "He", "came,", "he", "saw,", "he", "conquered.".  Notice

that for simplicity we are treating punctuation marks also as part of words. Also, note that two words may be separated by several spaces, not necessarily just one. Finally, we may have spaces also at the beginning or the end of the character string.For your reference, the main() program calling the function words() is given below.

int main(){

  char line[80];

  cin.getline(line,80);

  cout << words(line) << endl;

} 

Sample Test Cases

Input Output

Test Case 1

The quick brown fox, jumped , over,the lazy dog.

9

Test Case 2

I me myself

3

WRITE/COPY THESE CODE DIRECTLY IN NPTEL TERMINAL AND COMPILE AND RUN THEN SUBMIT.

PROGRAM:

int words(char *s){
    
    int countWords = 0;
    int i = 0;
    char ch = s[i];
    char lastChar = ' ';
    while (ch != '\0'){
       
        if(ch == ' '){
      if(lastChar == ' '){
         ;
     }else{
  ++countWords;
     }

        }else if(countWords == 0){
         ++countWords;
        }
        lastChar = ch;
        ++i;
        ch = s[i];
    }
    return countWords;
}

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