C++ Bitset Library - test() Function


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Description

The C++ function std::bitset::test() Tests whether Nth bit is set or not.

Declaration

Following is the declaration for std::bitset::test() function form std::bitset header.

C++98

bool test (size_t pos) const;

Parameters

None

Return value

Returns true if Nth bit is set otherwise false.

Exceptions

Throws out_of_range exception if pos is greater than or equal to bitset size.

Example

The following example shows the usage of std::bitset::test() function.

Live Demo
#include <iostream>
#include <bitset>

using namespace std;

int main(void) {

   bitset<4> b(1010);

   if (b.test(1))
      cout << "1st bit is set." << endl;

   if (!b.test(0))
      cout << "0th bit is not set." << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

1st bit is set.
0th bit is not set.

bitset.htm

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