/in/foo.cc: In function 'int main()':
/in/foo.cc:8:9: error: expected ';' before 's'
     s=0 s=s+i;
         ^
/in/foo.cc:12:2: error: 'return0' was not declared in this scope
  return0;
  ^~~~~~~
/in/foo.cc:6:6: warning: unused variable 'i' [-Wunused-variable]
  int i,s,n;
      ^