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  1. /******************************************************************************
  2.  
  3. Welcome to GDB Online.
  4. GDB online is an online compiler and debugger tool for C/C++.
  5. Code, Compile, Run and Debug online from anywhere in world.
  6.  
  7. *******************************************************************************/
  8. #include<iostream>
  9. #include <vector>
  10. using namespace std;
  11.  void printSubsets(vector<int>&arr,vector<int>&ans,int i){
  12.     if(i==arr.size()){
  13.         for(int val:ans){
  14.             cout<<val<<" ";
  15.  
  16.         }
  17.         cout<<endl;
  18.         return;
  19.  
  20.     }
  21.     ans.push_back(arr[i]);
  22.     printSubsets(arr,ans,i+1);
  23.  
  24.     ans.pop_back();
  25.     printSubsets(arr,ans,i+1);
  26.  
  27.  
  28.  }
  29.  
  30. int main(){
  31.   std::vector<int> arr1={1,2,3};
  32.  
  33.     vector<int>ans;
  34.     int i=0;
  35.     printSubsets(arr1,ans,i);
  36.     return 0;
  37.  
  38. }
Success #stdin #stdout 0.01s 5288KB
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45
stdout
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1 2 3 
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1 3 
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https://ideone.com/ySrJfF
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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