Segregate 0s and 1s in an array

#include using namespace std; void groupZeroOne(int a[], int len) { int left = 0; int right = len-1; while(left < right) { if(a[left] == 1) { while(right > left && a[right] == 1) right--; int t=a[left]; a[left] = a[right]; a[right] = t; left++; right--; } else left++; } } void printArray(int a[], int len) { for(int i=0;i