added square root function in c++

Author: JhaPrajjwal

Math/squareroot

@@ -0,0 +1,23 @@
+#include<iostream>
+#include<math.h>
+using namespace std;
+
+int sqrt(int x)
+{
+  if(x==0) return 0;
+
+  int counter=1;
+  while(pow(counter,2)<=x){
+    counter++;
+  }
+  counter--;
+  return counter;
+}
+int main()
+{
+  int n;
+  cout<<"Enter Number\n";
+  cin>>n;
+  cout<<"The square root of the number is: "<<sqrt(n)<<endl;
+  return 0;
+}