C++ any()
C++ any()函数
C++ any()函数用于测试是否设置了 中的至少一位。它返回一个布尔值，即true或false。
语法
参数
不带任何参数。
返回值
它返回一个布尔值0或1、
示例1
#include <iostream>
#include <bitset>
using namespace std;
int main()
{
// initialization
bitset<4> b1(string("1100"));
bitset<6> b2(string("000000"));
// function to check if any of
// its bits are set or not
bool result1 = b1.any();
if (result1)
cout<< b1 << " has a minimum of one-bit set"
<<endl;
else
cout<< b1 << " does not have any bits set"
<<endl;
// function to check if any of
// its bits are set or not
bool result2 = b2.any();
if (result2)
cout<< b2 << " has a minimum of one-bit set"
<<endl;
else
cout<< b2 << " does not have any bits set"
<<endl;
return 0;
}
输出:
1100 has a minimum of one-bit set
000000 does not have any bits set
示例2
#include <iostream>
#include <bitset>
using namespace std;
int main()
{
bitset<4> b1(string("1100"));
bitset<4> b2(string("00"));
bool result1 = b1.any();
if (result1)
cout<< b1.count() << " has a minimum of one-bit set"
<<endl;
else
cout<< b1.count() << " does not have any bits set"
<<endl;
bool result2 = b2.any();
if (result2)
cout<< b2.count() << " has a minimum of one-bit set"
<<endl;
else
cout<< b2.count() << " does not have any bits set"
<<endl;
return 0;
}
输出:
2 has a minimum of one-bit set
0 does not have any bits set
