C++ version of this thread.

```
class Solution {
public:
vector<int> productExceptSelf(vector<int>& nums) {
vector<int>res(nums.size(), 1);
for(int i = 1; i < nums.size(); i++)
res[i] = res[i-1] * nums[i-1];
int right = 1;
for(int i = nums.size() - 1; i >= 0; i--){
res[i] *= right;
right *= nums[i];
}
return res;
}
};
```