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bool test ( size_t pos ) const;
Return bit value
Returns whether bit at position pos in the bitset is set.
Unlike access operator ([]), this function perform a range check on pos before retrieveing the bit value.
Parameters
- pos
- Order position of the bit whose value is flipped.
Order positions are counted from the rightmost bit, which is order position 0.
size_t is an unsigned integral type.
Return value
true if bit at position pos is set, and false otherwise.
If pos is not a valid bit position, out_of_range is thrown.
Example
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// bitset::test
#include <iostream>
#include <string>
#include <bitset>
using namespace std;
int main ()
{
bitset<5> mybits (string("01011"));
cout << "mybits contains:\n";
cout << boolalpha;
for (size_t i=0; i<mybits.size(); ++i)
cout << mybits.test(i) << endl;
return 0;
}
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Output:
mybits contains:
true
true
false
true
false
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See also
| bitset::any | Test if any bit is set (public member function) |
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