回答編集履歴
2
ソース修正
test
CHANGED
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@@ -18,15 +18,13 @@
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18
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#include <bit>
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-
#include <cstdint>
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-
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//
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int main( )
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{
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-
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27
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+
uint32_t a = 0b111000;
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28
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std::cout << std::popcount(a) << "\n";
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30
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1
ソース追記
test
CHANGED
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@@ -1,3 +1,39 @@
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1
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-
`
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1
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+
`#include <bit>
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2
2
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3
3
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が必要です。
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4
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7
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結果(clang 10)
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8
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9
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```text
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10
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11
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usr ~/Project/test % ./a.out
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12
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13
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3
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14
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15
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usr ~/Project/test % cat t1.cpp
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16
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#include <iostream>
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18
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19
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#include <bit>
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20
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21
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#include <cstdint>
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//
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int main( )
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{
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28
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auto a = static_cast<std::uint32_t>(0b111000);
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30
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31
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std::cout << std::popcount(a) << "\n";
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32
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35
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return 0;
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36
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}
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38
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+
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39
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```
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