bitset all() function in C++ STL
The bitset::all() is a built-in function in C++ STL which returns True if all bits are set in the binary representation of a number if it is initialized in the bitset. It returns False if all the bits are not set.
Syntax:
bool bitset_name.all()
Parameter: This function does not accepts any parameter.
Return Value: The function returns a boolean value. The boolean value returned is true if all the bits are set, else the returned value is false,
Below programs illustrates the bitset::all() function.
Program 1:
// CPP program to illustrate the // bitset::all() function #include <bits/stdc++.h> using namespace std; int main() { // Initialization of bitset bitset<4> b1(string( "1100" )); bitset<6> b2(string( "111111" )); // Function that checks if all // the bits are set or not bool result1 = b1.all(); if (result1) cout << b1 << " has all bits set" << endl; else cout << b1 << " does not have all bits set" << endl; // Function that checks if all // the bits are set or not bool result2 = b2.all(); if (result2) cout << b2 << " has all bits set" << endl; else cout << b2 << " does not have all bits set" << endl; return 0; } |
Output:
1100 does not have all bits set 111111 has all bits set
Program 2:
// CPP program to illustrate the // bitset::all() function // when the input is as a number #include <bits/stdc++.h> using namespace std; int main() { // Initialization of bitset bitset<2> b1(3); bitset<3> b2(5); // Function that checks if all // the bits are set or not bool result1 = b1.all(); if (result1) cout << b1 << " has all bits set" << endl; else cout << b1 << " does not have all bits set" << endl; // Function that checks if all // the bits are set or not bool result2 = b2.all(); if (result2) cout << b2 << " has all bits set" << endl; else cout << b2 << " does not have all bits set" << endl; return 0; } |
Output:
11 has all bits set 101 does not have all bits set
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