The output code is stuck!

Question

#include <iostream>
#include <string>
#include <sstream>
using namespace std;
string isAutomorphic(){
string a;
int num;
int is;
int c;
string f;
string r;
string x;
stringstream stream;
cin >> a;
cout << "Your number: " << a << endl;
stream << a;
stream >> num;
int b = num * num;
cout << "Squared: " << b << endl;
stream.str("");
stream << b;
stream >> x;
int z = num;
is = x.find_last_of(z);
stream.str("");
stream << num;
stream >> r;
if (num != (r.size() - (r.size() - is))){
f = "No, it is not an automorphic number.";
}
else if (num == (r.size() - (r.size() - is))){
f = "Yes, it is an automorphic number.";
}
stream.str("");
return f;
}
int main() {
cout << isAutomorphic() << endl;
return 0;
}

The code is stuck on “No, it is not an automorphic number”.
https://code.sololearn.com/c8q1auNCtlWZ/?ref=app

Answer 1

Hi, I'm not sure of your code but,

#include <bits/stdc++.h>
using namespace std;

int main(){
int x, z, digit;
long int y;

cin >> x; // except 0, 1
z = x;
y = x*x;
digit = 0;

while(z>0){
z = z/10;
++digit;
}

cout << boolalpha;
// 0-> false, 1-> true

cout << ((y%pow(10,digit))==x) << '\n' ;

return 0;
}