1. Time to finish first stack program
Computer Science 2
4/18/2014
Dry Run
Time to finish first stack program
Second Stack Program

2. procedure c(var top:ptrtype); var temp:ptrtype; begin temp:=top;
program DryRunPointers;
type
ptrtype = ^rectype;
rectype = record
score:integer;
next:ptrtype;
end;
var
top:ptrtype;
count:integer;
procedure a(var top:ptrtype;count:integer);
temp:ptrtype;
begin
new(temp);
temp^.score:=count;
temp^.next:=top;
top:=temp;
procedure b(top:ptrtype);
temp:=top;
if top<> nil then
repeat
writeln(temp^.score);
temp:=temp^.next;
until (temp=nil) or (temp=top);
procedure c(var top:ptrtype);
var
temp:ptrtype;
begin
temp:=top;
top:=top^.next;
dispose(temp);
end;
procedure d(var top:ptrtype);
while temp^.next<> nil do
temp:=temp^.next;
temp^.next:=top;
begin {Of the main body};
top:=nil;
for count:= 1 to 4 do
a(top,2*count);
b(top);
c(top);
d(top);
end.

3. Online Time to Finish First Stack Program

4. A VALuable Procedure
val(String, RealOrIntegerVariable, IntegerErrorCode);
Converts a String into a real or an integer value
program test;
var
error:integer;
x:real;
number:string;
begin
writeln('Please enter a number (-1 to quit)');
readln(number);
while (number <> '-1') do
val(number, x, error);
if error = 0 then
writeln(x)
else
writeln('Error !!!');
end;
end.

5. Second Stack Program Hire ‘em, Fire ‘em
Write a program to model a human resource department with the following
Menu:
Hire an employee (Name, Job title, Phone Number)
Fire an employee, based solely on seniority
Show all employees
Push: Save employees to a file
Push: Load employees from a file back into the stack.