C++ bitset all() Function

C++ bitset all() function is used to test whether all bits from bitset are 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 true or false.

Example 1

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
bitset<4> b;
bitset<4> mask("1111");
if (!b.all())
cout<< "All bits are not set." <<endl;
b |= mask;
if (b.all())
cout<< "All bit are set." <<endl;
return 0;
}

Output:

All bits are not set.
All bit are set.

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C++ Bitset Function