Question

i)
int a=5;
int p= ++a+ --a + a++ + a-->
System.out.println(p);
ii)
int a=4;
int r= att + --a + ++a + --a;
System.out.println(r);
int a=6;
int s= Ha + --a + att + --a;
System.out.println(s);
iv)
int a=7;
int u= a++ + a-- + a++ + a-- +a;
System.out.println(u);
​

Answer 1

Question 1 Solution:

Given C∅de:

int a = 5;

int p = ++a + --a + a++ + a--

System.out.println(p);

Output:

22

Solution:

→ a = 5 (Given)

→ p = ++a + --a + a++ + a--

→ p = 6 + --a + a++ + a-- (a becomes 6, pre-increment)

→ p = 6 + 5 + a++ + a-- (a becomes 5, pre-decrement)

→ p = 6 + 5 + 5 + a-- (a is 5, post-increment)

→ p = 6 + 5 + 5 + a-- (a becomes 6)

→ p = 6 + 5 + 5 + 6 (a is 6, post-decrement)

→ p = 6 + 5 + 5 + 6 (a becomes 5)

→ p = 22

Output: 22

Question 2 Solution:

Given C∅de:

int a = 4;

int r = a++ + --a + ++a + --a;

System.out.println(r);

Output:

21

Solution:

→ a = 5 (Given)

→ r = a++ + --a + ++a + --a

→ r = 5 + --a + ++a + --a (a is 5, post-increment)

→ r = 5 + --a + ++a + --a (a becomes 6)

→ r = 5 + 5 + ++a + --a (a is 5, pre-decrement)

→ r = 5 + 5 + 6 + --a (a is 6, pre-increment)

→ r = 5 + 5 + 6 + 5 (a is 5, pre-decrement)

→ r = 21

Output: 21

Question 3 Solution:

Given C∅de:

int a = 6;

int s = ++a + --a + a++ + --a

System.out.println(s);

Output:

23

Solution:

→ a = 6 (Given)

→ s = ++a + --a + a++ + --a

→ s = 7 + --a + a++ + --a (a is 7, pre-increment)

→ s = 7 + 6 + a++ + --a (a is 6, pre-decrement)

→ s = 7 + 6 + 6 + --a (a is 6, pre-increment)

→ s = 7 + 6 + 6 + --a (a becomes 5)

→ s = 7 + 6 + 6 + 4 (a is 4, pre-decrement)

→ s = 23

Output: 23

Question 4 Solution:

Given C∅de:

int a = 7;

Output:

37

Solution:

→ a = 7

→ u = a++ + a-- + a++ + a-- + a

→ u = 7 + a-- + a++ + a-- + a (a is 7, post-increment)

→ u = 7 + a-- + a++ + a-- + a (a becomes 8)

→ u = 7 + 8 + a++ + a-- + a (a is 8, post-decrement)

→ u = 7 + 8 + a++ + a-- + a (a becomes 7)

→ u = 7 + 8 + 7 + a-- + a (a is 7, post-increment)

→ u = 7 + 8 + 7 + a-- + a (a becomes 8)

→ u = 7 + 8 + 7 + 8 + a (a is 8, post-decrement)

→ u = 7 + 8 + 7 + 8 + a (a becomes 7)

→ u = 7 + 8 + 7 + 8 + 7

→ u = 21 + 16

→ u = 37

Output: 37

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