# Program to generate all the subsets of an array

**Program to generate all the subsets of an array**

Given a list of numbers , write a Program to generate all the subsets of an array.

**Sample input:**

3 1 2 3

**sample output:-**

3 2 2 3 1 1 3 1 2 1 2 3

**Program to generate all the subsets of an array:-**

The objective of the code is to generate all the subsets of a list of elements . So we will write Program to generate all the subsets of an array .

**Code:-**

//Program to print the all subsets #include<bits/stdc++.h> using namespace std; vector<vector<int>> subsets; // function for print the subsets void Printsubsets(vector<int > &subset, int i ,vector<int >&nums) { if(i==nums.size()) { subsets.push_back(subset); return; } // ith element in subset Printsubsets(subset,i+1,nums); // ith element in subset subset.push_back(nums[i]); // call function for next element Printsubsets(subset,i+1,nums); // backtrack subset.pop_back(); } // Driver function int main() { vector<int> arr,empty; int n,ele; cout<<"Enter the number of elements"<<endl; cin>>n; for(int i=0;i<n;i++) { cin>>ele; arr.push_back(ele); } // calling of function Printsubsets(empty,0,arr); // printing of all the subsets cout<<"Subsets are "<<endl; for(auto subset : subsets) { for(auto ele : subset) { cout<<ele<<" "; } cout<<endl; } return 0; }

**Output:-**

Enter the number of elements 3 1 2 3 Subsets are 3 2 2 3 1 1 3 1 2 1 2 3

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