Merge pull request #45 from Yash636261/main

Create recursive.cpp

Author: gantavyamalviya

CPP/array-2d/recursive.cpp

@@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+bool exp(int arr[],int n,int target,int count=0)
+{
+    ;
+    if(count==3&&target==0)
+      return true;
+    if(count==3||n==0||target<0)
+      return false;
+    return exp(arr, n - 1, target - arr[n - 1], count + 1) ||
+            exp(arr, n - 1, target, count);
+}
+int main(){
+    int arr[]={ 2, 7, 4, 0, 9, 5, 1, 3 };
+    int target = 6;
+    int n=sizeof(arr)/sizeof(arr[0]);
+    exp(arr,n,target,0)?cout<<"triplets exist":
+    cout<<"tripletes doesn't exists";
+    return 0;
+}