C Programming - Bitwise Operators - Discussion
Discussion Forum : Bitwise Operators - Find Output of Program (Q.No. 10)
10.
What will be the output of the program?
#include<stdio.h>
int main()
{
printf("%d %d\n", 32<<1, 32<<0);
printf("%d %d\n", 32<<-1, 32<<-0);
printf("%d %d\n", 32>>1, 32>>0);
printf("%d %d\n", 32>>-1, 32>>-0);
return 0;
}
Discussion:
42 comments Page 1 of 5.
R K said:
1 decade ago
In case:
32<<1 means 0010 0000 are add +1 0100 0000 = 64.
32<<0 means 0010 0000 are add +0 0010 0000 = 32.
32<<-1 means 0010 0000 Zero -1 0000 0000 = 0.
32<<-0 means 0010 0000 L less -0 0010 0000 = 32.
32>>-1 means 0010 0000 Zero -1 0100 0000 = 64.
32>>-0 means 0010 0000 L less -0 0010 0000 = 0.
32<<1 means 0010 0000 are add +1 0100 0000 = 64.
32<<0 means 0010 0000 are add +0 0010 0000 = 32.
32<<-1 means 0010 0000 Zero -1 0000 0000 = 0.
32<<-0 means 0010 0000 L less -0 0010 0000 = 32.
32>>-1 means 0010 0000 Zero -1 0100 0000 = 64.
32>>-0 means 0010 0000 L less -0 0010 0000 = 0.
(1)
Ahmed said:
8 years ago
In case;
32<<1 means 0010 0000 are add +1 0100 0000 = 64.
32<<0 means 0010 0000 are add +0 0010 0000 = 32.
32<<-1 means 0010 0000 Zero -1 0000 0000 = 0.
32<<-0 means 0010 0000 L less -0 0010 0000 = 32.
32>>-1 means 0010 0000 Zero -1 0100 0000 = 64.
32>>-0 means 0010 0000 L less -0 0010 0000 = 0.
What the mean of the abbreviation l Less -0 and Zero -1.
32<<1 means 0010 0000 are add +1 0100 0000 = 64.
32<<0 means 0010 0000 are add +0 0010 0000 = 32.
32<<-1 means 0010 0000 Zero -1 0000 0000 = 0.
32<<-0 means 0010 0000 L less -0 0010 0000 = 32.
32>>-1 means 0010 0000 Zero -1 0100 0000 = 64.
32>>-0 means 0010 0000 L less -0 0010 0000 = 0.
What the mean of the abbreviation l Less -0 and Zero -1.
(1)
Venkatesh said:
8 years ago
32<<-1 is equal to 32<<FFFF.
Ramdas said:
1 decade ago
Its compiler dependent or we can say if there is negative No. At right hand side of >> or <<. Then the answer of that expression will be undefined.
Ankush said:
1 decade ago
Please explain the answer as per GCC compiler. It is:
64 32
16 32
16 32
64 32
64 32
16 32
16 32
64 32
Vincent said:
1 decade ago
C reference manual says that result of a shift by negative value is undefined. So it really means probably that this value depends on a C compiler. Because of this I do not think that the question is appropriate for general C language test.
Tej said:
1 decade ago
-1>>(any number). You get -1 not 0.
Akshay Kalra said:
1 decade ago
For gcc compiler Answer is:
64 32.
16 32.
16 32.
64 32.
Because 32 << -1 is equivalent to 32 >> 1 == 16 and I guess rest is fine.
64 32.
16 32.
16 32.
64 32.
Because 32 << -1 is equivalent to 32 >> 1 == 16 and I guess rest is fine.
Alice said:
1 decade ago
How come 32>>1=16?
Monisha said:
10 years ago
How is it possible to get 32>>1=16?
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