/*
 * question7.c
 * FINAL
 * BY: John Stile
 * Purpose:
 *   Explain the following code fragments
 */


////////////////
//  A - prints if a is divisable by 10, with space for other digits
//      0         1         2         3         4         5 
////////////////
int a // declare an int variable named 'a'
      // this is missing ';' at the end of line

for (a=0; a<60 ; a++) // initialize a to zero
                      // if a contains value less than 60, do block
                      // after block execution, increment value stored in a by 1
{
  if ( !(a%10) )     // divide contents of a by 10,
                     // if the remainder is 0, evaluate if() as TRUE 
                     // if the remainder is non-zero, evaluate if() as FALSE
                     // if is TRUE, do first print
                     // if is FALSE, do second print 
                     // Effectively, this only prints if a is divisable by 10
  {
     printf("%D", a/10); // print the 10's places
  } else {
     printf(" ");  // print a space if not divisable by 10
  }
}
////////////////
//  B - counts the number of each type of letter (irrespective of case), stores in an array.
////////////////
for (i=0; line[i]; i++)  // initialize i to zero
                         // evaluate if contents of line[i] is TRUE or FALSE
                         // if line[i] contains '\0' it is FALSE
                         // else it is TRUE and we do block
{
  if (!isalpha(line[i])) // if line[i] does not contains an alpha character, do block
  {
    continue;  // go to next iteration of the for loop
  }

  if ( line[i] <= 'A' && line[i] <= 'Z' ) // if line[i]  contains an uppercase letter, do block
  {
    c=tolower(line[i]); // assign lower case version of letter in line[i] to variable c
  } else {              // if line[i]  contains an lowercase letter, do block
    c = line[i];        // assign letter in line[i] to variable c
  }
  letters[ c-'a' ]++ ;  // increment array element representing the number of each type of letter
}