/in/foo.cc: In function 'int peach(int)':
/in/foo.cc:8:21: error: 'peace' was not declared in this scope
  return 2*(peace(n-1)+1);
                     ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:13:7: error: 'n' was not declared in this scope
  cin>>n;
       ^