/in/foo.cc: In function 'bool isSuperPrime(int)':
/in/foo.cc:16:22: error: 'isPrime' was not declared in this scope
         if(!isPrime(n)){
                      ^
/in/foo.cc: In function 'void sample1()':
/in/foo.cc:25:10: error: 'n' was not declared in this scope
     cin>>n;
          ^