Inline Functions

1
Inline Functions

• //Create the class "queue with inline functions
• class queue
• int q100
• int sloc, rloc
• public
• queue()rloc sloc 0 cout ltlt "New Queue\n"
• queue() cout ltlt "Queue Destroyed\n"
• void qput(int i)
• int qget()
• // Notice that the function code is inside the
• // class definition.

2
Array of Objects(NOT an array)

• int main()
• queue a, b, c
• ...

a
b
c
3
Array of Objects

• int main()
• queue Q3
• ...

Q0
Q1
Q2
4
Array of Objects

• Q0.qput(1)
• Q1.qput(2)
• Q2.qput(3)
• Q0.qput(11)
• Q1.qput(12)
• Q2.qput(13)

Q0
11
1
Q1
2
12
Q2
3
13
5
Pointers to Objects

• queue q, Q3, p //p is a pointer
• q.qput(0)
• Q0.qput(1)
• Q1.qput(2)
• Q2.qput(3)
• p q

p
q
0
Q0
1
Q1
2
Q2
3
6
Pointers to Objects

• p q
• cout ltlt p-gtqget()
• p Q0
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()

p
q
0
Q0
1
Q1
2
Q2
3
7
Pointers to Objects

• p q
• cout ltlt p-gtqget()
• p Q0
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()

p
q
0
Q0
1
Q1
2
Q2
3
8
Pointers to Objects

• p q
• cout ltlt p-gtqget()
• p Q0
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()

p
q
0
Q0
1
Q1
2
Q2
3
9
Pointers to Objects

• p q
• cout ltlt p-gtqget()
• p Q0
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()
• p
• cout ltlt p-gtqget()

p
q
0
Q0
1
Q1
2
Q2
3
10
Exercise

• int count 0
• //Create the class "obj"
• class obj
• public
• obj() count cout ltlt count ltlt endl
• obj()--count cout ltlt count ltlt endl
• int id // Unique identifier for each object
• void main()
• obj A
• cout ltlt "begin block" ltlt endl
• obj B
• cout ltlt "end block" ltlt endl

11
Exercise

• int count 0
• //Create the class "obj"
• class obj
• public
• obj() count cout ltlt count ltlt endl
• obj()--count cout ltlt count ltlt endl
• int id // Unique identifier for each object
• void main()
• Instantiate an array of 3 objs
• Declare an obj pointer p
• Sequentially point p to each object as
• you assign the obj a unique id
• Sequentially print out each unique id

12
Exercise - a solution

• class obj
• public
• obj() count cout ltlt count ltlt endl
• obj()--count cout ltlt count ltlt endl
• int id
• void main()
• obj A3, p
• p A0
• p-gtid 151
• p
• p-gtid 152
• p
• p-gtid 153
• for (int i 0 i lt 3 i)
• cout ltlt Ai.id ltlt endl