Question

E5.5 (página 239) Write a function setbits(int x.char p.char n) that returns x with the n bits that begin at position p inverted (ie 1 changed to O and vice versa). Consider the position 0 the least significant bit of the variable x (remember that x is an integer)

Using lenguague C

Answer 1

Code:-

#include<stdio.h>
int toggleKthBit(int n, int k)
{
return (n ^ (1 << (k-1)));
}
int setbits(int x,char p,char n)
{
   int i;
   for(i=0;i<n-'0';i++)
   {
       x=toggleKthBit(x,p-'0'+i+1);
   }
   return(x);
}
int main()
{
   int x=18;
   char p='1';
   char n='3';
  
   printf("New value of %d is %d",x,setbits(x,p,n));
}

Sample Output:-

F:Codes Untitled2.exe New value of 18 is 28 Process exited after 0.6631 seconds with return value 21 Press any key to continue . . .

As x=18 which is 10010 in binary.

p=1 and n=3;

So,the result is 11100 which is 28.