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std::bitset::all

std：：bitset：：all，std：：bitset：：any，std：：bitset：：no

bool all() const;(1)(since C++11)
bool any() const;(2)​
bool none() const;(3)​

检查是否所有、任何或任何位都设置为true...

1%29检查是否将所有位设置为true

2%29检查是否将任何位设置为true

3%29检查是否没有将位设置为true

参数

%280%29

返回值

1%29true如果所有位都设置为true，否则false

2%29true如果任何位被设置为true，否则false

3%29true如果没有任何位设置为true，否则false

例外

(none)(until C++11)
noexcept specification: noexcept(since C++11)

例

二次

#include <iostream>
#include <bitset>
 
int main()
{
    std::bitset<4> b1("0000"
    std::bitset<4> b2("0101"
    std::bitset<4> b3("1111"
 
    std::cout << "bitset\t" << "all\t" << "any\t" << "none\n";
    std::cout << b1 << '\t' << b1.all() << '\t' << b1.any() << '\t' << b1.none() << '\n';
    std::cout << b2 << '\t' << b2.all() << '\t' << b2.any() << '\t' << b2.none() << '\n';
    std::cout << b3 << '\t' << b3.all() << '\t' << b3.any() << '\t' << b3.none() << '\n';
}

二次

产出：

二次

bitset  all     any     none
0000    0       0       1
0101    0       1       0
1111    1       1       0

二次

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