Added few comments

Author: divyaachoudharyy

Strings/check_if_strings_are_rotation_of_eachother.cpp

@@ -6,12 +6,14 @@ A Program to check if strings are rotations of each other or not.
 
 SOLUTION (in C++):
 
+//Suppose there are two strings s1 = "devincept" and s2 = "vinceptde", 
 
-Suppose there are two strings s1 = "devincept" and s2 = "vinceptde", 
+//to check if s2 is rotation of s1, what we can do is, add s1 to itself
 
-to check if s2 is rotation of s1, what we can do is string result = s1 + s1
+// Assign it to another string s3 = s1 + s1
+
+//If s2 is a substring of s1, it is rotation of s1.
 
-and see if s2 is a substring of s1.
 
 
 #include<bits/stdc++.h>
@@ -25,7 +27,7 @@ int main()
    cin>>s1;
    cin>>s2;
    s3 = s1 + s1;
-   if(s3.find(s2) != -1 && s1 != s2)
+   if(s3.find(s2) != -1 && s1 != s2)//if s2 is not a substringof s1 then find returns -1
    {
       cout<<s2<<" is rotation of "<<s1;
    }