How can i change this bit?

[Helegurbann]

#include <bitset>
#include <iostream>

using namespace std;

int main()
{int a=25,b;
bitset<8>binarya(a);
cout<<binarya<<endl;
binarya[4]=0;
cout<<binarya<<endl;
bitset<8>binaryb(b);
binaryb=binarya;
binaryb[4]=1;
cout<<a<<endl;
cout<<b<<endl;
    system("PAUSE");
    return EXIT_SUCCESS;
}

How can i change this a value's 4th bit?Bitset is not changing.

[DSLq5Di1]

binarya is constructed with a copy of a, changes to one will not be reflected in the other.

A roundabout way of doing what you expected:-

int a = 25;
cout << bitset<8>(a) << " " << a << endl;

bitset<8> binarya(a);
binarya[4] = 0;

a = binarya.to_ulong();
cout << bitset<8>(a) << " " << a << endl;

00011001 25
00001001 9

[Helegurbann]

Thank u for ur help.