Program to check if 2 strings are rotations of each other or not

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string a,b;
    cout<<"enter the first string\n";
    cin>>a;
    cout<<"enter the second string\n";
    cin>>b;
    if(a.length()==b.length()){
        string c=a+a;
        if(c.find(b)){
            cout<<"Yes , both strings are rotation of each other\n";
        }
    }
    else{
        cout<<"No, both strings are not the rotation of each other\n";
    }
    return 0;
}