Swap bits at ith and jth position of integer n

 

#include <iostream> 
using namespace std; 
  
//function to swap bits of an integer n
unsigned swapBit(unsigned int n, unsigned int i, unsigned int j) 
{ 
    if(( n & (1 << (i-1))) != (n & (1 << (j-1)))){
        n ^= (1 << (i-1)) ^ (1 << (j-1));
    } 
    return n;
} 
  
int main() 
{ 
    unsigned int n = 7, i = 1, j = 4 ;
    unsigned int result = swapBit(n,i,j);
    cout << "After swapping the bit at position "<< i <<" and "<< j << " of integer "<< n << ", we get  "<< result<<"." << endl; 
    return 0; 
}

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