bitset::size() is a built-in STL in C++ which returns the total number of bits.
Syntax:
bitset_name.size()
Parameter: The function accepts no parameter.
Return Value: The function returns an integral value which signifies the number of bits. It eventually returns the size that has been given while initializing the bitset.
Below programs illustrate the bitset::size() function.
Program 1:
C++
// C++ program to illustrate the // bitset::size() function // when input is a string #include <bits/stdc++.h> using namespace std;
int main()
{ // initialization of the bitset string
bitset<4> b1(string( "1100" ));
bitset<6> b2(string( "010010" ));
// prints the size i.e.,
// the number of bits in "1100"
cout << "The number of bits in " << b1
<< " is " << b1.size() << endl;
// prints the size i.e.,
// the number of bits in "010010"
cout << "The number of bits in " << b2
<< " is " << b2.size() << endl;
return 0;
} |
Output:
The number of bits in 1100 is 4 The number of bits in 010010 is 6
Program 2:
C++
// C++ program to illustrate the // bitset::size() function // when input is a number #include <bits/stdc++.h> using namespace std;
int main()
{ // initialization of the bitset string
bitset<3> b1(5);
bitset<5> b2(17);
// prints the size i.e.,
// the number of bits in 5
cout << "The number of bits in " << b1
<< " is " << b1.size() << endl;
// prints the size i.e.,
// the number of bits in 17
cout << "The number of bits in "
<< b2 << " is " << b2.size() << endl;
return 0;
} |
Output:
The number of bits in 101 is 3 The number of bits in 10001 is 5