Output of Following C Program

Question

What will be output ?

A. Abnormal Termination.

B. Infinite loop

C. Output wil be 65536

D. None

Ans. D

Comments

a=240 and b=1  = 2^240-240

a=241 and b=2 =2^241-240

a=242 and b=2*2 =2^242-240

a=243 and b=2*2*2=2^243-240

.........

a=255 and b= 2¹⁵ = 2^255-240

a=256 which takes 2B but unsigned char has 1B so the considering little endian architecture, the MSB i.e. 1 goes out of this 1B and a becomes 0.

b=2^256-240=2¹⁶. b is unsigned short which has 2B but 2¹⁶ requires 17 bits i.e. >2B. So again MSB goes out from this 2B and it becomes 0.

So i think function will return 0.