Note: Setbit

#include <iostream>

using namespace std;

char* getBitPattern(unsigned int val, int fromIndex, int toIndex){

  char* bp= new char[toIndex - fromIndex + 2];

  int i, j;

  for(i=toIndex,j=0;i>=fromIndex;i--,j++){

    // slow

    //if((1 << i) & val){

    //  bp[j] = '1';

    //}

    //else{

    //  bp[j] = '0';

    //}

    //fast

    //bp[j] = ((1 << i) & val) ? '1':'0';

    // faster

    bp[j] = !!((1 << i) & val) + '0';

  }

  bp[j] = 0;

  return bp;

}

int main(){

  unsigned int v = 0x0000FF00;

  char* bits = getBitPattern(v, 4, 11);

  cout<<bits<<endl;

  delete[] bits;

  return 0;

}

The rerult of his problem is 11110000.