Added a program to print all subsets of an array

algorithms/CPlusPlus/Bit-Manipulation/print-all-subsets.cpp

@@ -0,0 +1,56 @@
+/*
+Description - To print all subsets/power set of an array using bit manipulation
+
+Approach - 	Iterate from 0 to (2^n)-1
+			For each iteration, we will check the postion of set bits in its binary form  
+			if i-th bit in that number is set,then we print i-th element in the array
+
+Time complexity - O(2^n) exponential
+*/
+
+#include<iostream>
+using namespace std;
+
+// Function to print the subsets
+void printallsubsets(int* arr,int n){
+	int total_length = 1<<n;               //To find total number of subsets,bit left shift is used to find power of 2.
+	for (int i=0;i<total_length;i++){
+
+		int j = i;
+		int p = 0;                        //This is used to track the position of set bits in the number
+		while (j!=0){
+
+			if (j&1<<0) cout<<arr[p];      //Check if last bit is set, we print the element if it is set.  
+			
+			j = j>>1;                     //Bit right shift 
+			p++;                          
+		}
+		cout<<"\n";
+
+	}
+
+}
+
+int main(){
+									               
+	int length_of_the_array = 3;	
+	int arr[] = {1,2,3};                         //Integer array is used
+	printallsubsets(arr,length_of_the_array);
+}
+
+/* 
+Sample input-
+	array = {1,2,3}
+Output-
+		
+	1
+	2
+	12
+	3
+	13
+	23
+	123
+
+*Note  - one subset is empty subset
+*/
+

algorithms/CPlusPlus/README.md

@@ -205,4 +205,8 @@
 
 ## Backtracking
 
-- [N-Queens Problem](Backtracking/n-queens.cpp)
+- [N-Queens Problem](Backtracking/n-queens.cpp)
+
+## Bit Manipulation
+
+- [Print all subsets of an array](Bit-Manipulation/print-all-subsets.cpp)