bitset size() in C++ STL
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(){ // initilization 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(){ // initilization 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
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