Question #1(a-c) /Answer

Question 1A

The following design is for a program which counts the number of occurrences of the digits '0'-'9' in a line of text entered from the keyboard. The data table is as follows:-

1	Total ¬ 0
2	NextNumber ¬ 0
3.1	loop while NextNumber ³ 0
3.2	  write out "Enter a non-negative integer,or a negative one to quit: "
3.3	  read in NextNumber
3.4       if NextNumber ³ 0 then
3.5         Total = Total + NextNumber
3.6       ifend
3.7     loopend
3.8     write out "Total = ", Total

Write C++ code to implement this design. Your code should include declarations. You may assume that the MT262io library of functions is available for use. [6]

Question 1B

The following design is for a program which accepts a number of non-negative integers entered from the keyboard and writes out their sum. Entering a negative integer signals that data input is finished. The data table is as follows :-

Note: that the design that follows uses features of the ASCII code

1	Count ¬ 0
2	write out "Enter a line of text: "
3	read in Line
4	loop for Index ¬ 1 to Length(Line)
4.2	  if Line[Index] ³ '0' and Line[Index] £  '9' then
4.3	    Count ¬ Count + 1
4.4       ifend
4.5     loopend
5       write out "Number of digits = ", Count

Write C++ code to implement this design. Your code should include declarations. You may assume that the MT262io library of functions is available for use. [6]

Question 1C

The following design is for a program which accepts a non-empty line of text entered from the keyboard and writes out the the number of vowels and the number of non-vowels in the text. The data table is as follows:-

1.1	Vowels ¬ 0
1.2	NonVowels ¬ 0
1.3	write out "Enter a non-empty line of text: "
1.4     read in Line
2.1	loop for Index ¬ 1 to Length(Line)
2.2	  select case depending on value of Line[Index]
2.3         'a': Vowels ¬ Vowels + 1	
2.4         'A': Vowels ¬ Vowels + 1
2.5         'e': Vowels ¬ Vowels + 1
2.6         'E': Vowels ¬ Vowels + 1
2.7         'i': Vowels ¬ Vowels + 1
2.8         'I': Vowels ¬ Vowels + 1
2.9         'o': Vowels ¬ Vowels + 1
2.10        'O': Vowels ¬ Vowels + 1
2.11        'u': Vowels ¬ Vowels + 1
2.12        'U': Vowels ¬ Vowels + 1 
2.13        default: NonVowels ¬ NonVowels + 1 
2.14      selectend
2.15    loopend
3.1     write out "Number of vowels = ", Vowels
3.2     write out "Number of non-vowels = ", NonVowels

Write C++ code to implement this design. Your code should include declarations. You may assume that the MT262io library of functions is available for use. [6]