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Program Discussion :: Bitwise Operator
Home > Programs > Bitwise Operator

16. Write an efficient program to toggle all bits in a given integer number

Answer:

#include <stdio.h>
#include<iostream>
using namespace std;
int main()
{
    int num, n, newNum;
    /*Reads a number from user*/
   cout<<"Enter any number: ";
     cin>>num; 
    /*Reads the bit number you want to toggle*/
    cout<<"Enter nth bit to toggle (0-31): ";
     cin>>n; 
    /* Left shifts 1 to n times then perform bitwise XOR with number and result of above*/
    newNum = num ^ (1 << n);
     cout<<"Bit toggled successfully.\n\n";
     cout<<"Number before toggling %d bit: %d (in decimal)\n", n, num;
     cout<<"Number after toggling %d bit: %d (in decimal)\n", n, newNum; 
    return 0;

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