set5 1-7

Question 1

/* 1
What output does the following program fragment produce?
i = 1;
while (i <= 128)
{ printf (“%d “, i );
i *= 2;
}
*/

Answer 1

1 2 4 8 16 32 64 128

Question 2

/* 2
What output does each of the following two statements produce?
Statement 1:
for (i = 5, j = i – 1; i > 0; –i, j = i - 1)
printf(“%d %d”, i, j);

Statement 2:
for (i = 5, j = i – 1;
i > 0, j > 0;
–i, j = i - 1)
printf(“%d %d”, i, j);
*/

Answer 2

Statement 1:
5 44 33 22 11 0

Statement 2:
5 44 33 22 1

Question 3

/* 3
Which one of the following statements is not equivalent to the other two (assuming that the loop bodies are the
same)?
• while (i < 10) {…}
• for (; i < 10;) {…}
• do {…} while (i < 10) ;
*/

Answer 3

do while, because do while will always iterate at least once (checks the condition after one iteration)

Question 4

/* 4
What output does the following for statement produce?
for (i = 10; i >= 1; i /= 2)
printf(“%d “, –i);
*/

Answer 4

9 3 0

Question 5

/* 5
What output does the following for statement produce?
for (i = 10; i >= 1; i %= 2)
printf(“%d “, i++);
*/

Answer 5

10 1

Question 6

/* 6
What output does the following for statement produce?
for (i = 10; i >= 1; i *= 2)
printf(“%d “, (i-=6));
*/

Answer 6

4 2 -2

Question 7

/* 7
What output does the following for statement produce?
for (i = 10; i >= 1; i -= 1)
printf(“%d “,(i/=2));
*/

Answer 7

5 2 0