x^=2;
What would the value of x be at the end of this snippet?
int x = 12;
x ^= 2;
And how did you get to your answer?
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run it and find out.
i got the last one by converting to binary first before or'ing.
i got the last one by converting to binary first before or'ing.
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^ is the bit-wise xor operator.
That means that this code is equivalent to
Now we need a truth-table for xor:
0 xor 0 is 0
1 xor 0 is 1
0 xor 1 is 1
1 xor 1 is 0
12 in binary is 1100
2 in binary is 0010
So if we xor every bit we get:
1110
In decimal, that would be 14.
x ^= y is equivalent to: x = x ^ y. That means that this code is equivalent to
x = 12 ^ 2Now we need a truth-table for xor:
0 xor 0 is 0
1 xor 0 is 1
0 xor 1 is 1
1 xor 1 is 0
12 in binary is 1100
2 in binary is 0010
So if we xor every bit we get:
1110
In decimal, that would be 14.
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OP why change your original question?
i won't do your homework for you. but it looks like stewbond will :)
i won't do your homework for you. but it looks like stewbond will :)
Thank you @Stewbond!
@mutexe I was just looking for a clear explanation of how xor works, and an example of how to do it on paper, I thought someone on here might be willing to explain it.
@mutexe I was just looking for a clear explanation of how xor works, and an example of how to do it on paper, I thought someone on here might be willing to explain it.
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