檢查2的n次方
if ((i&(i - 1)) == 0) { // Is a power of 2 or zero.
}
這樣就可以檢查2的n次方. 這個包含0
if (i && ((i & (i - 1)) == 0)) { // Is a power of 2.
}
這樣檢查2的n次方.
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if ((i&(i - 1)) == 0) { // Is a power of 2 or zero.
}
這樣就可以檢查2的n次方. 這個包含0
if (i && ((i & (i - 1)) == 0)) { // Is a power of 2.
}
這樣檢查2的n次方.
This site uses Akismet to reduce spam. Learn how your comment data is processed.
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