C++ bitset any() Function

C++ bitset any() function is used to test whether at least one bit from bitset is set or not. It returns a boolean value i.e either true or false.

Syntax

Parameter

It does not take any parameter.

Return value

It returns a Boolean value either 0 or 1.

Example 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;
}

Output:

1100 has a minimum of one-bit set
000000 does not have any bits set

Example 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;
}

Output:

2 has a minimum of one-bit set
0 does not have any bits set

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C++ Bitset Function