Space Deletion

1. Consider the following code which prints out the length of each input line (excluding the newline character).

   
   #include <iostream>
   using std::cin;
   using std::cout;
   using std::endl;
   
   int main()
   {
       int len;
       const int MAX_LEN = 20;
       char s[MAX_LEN];
       char* p;
       while ( cin.getline(s, MAX_LEN) )
       {
           for(p = s; *p != '\0'; p++)
               ;
           cout << p - s << endl;
       }
       return 0;
   }
   
   

2. Modify the program so that it will delete the spaces in each input string and print it out.
3. The program may run as follows.

   
   This is a book.
   Thisisabook.