/in/foo.cc:2:11: error: '::main' must return 'int'
 void main()
           ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:3: error: 'c' was not declared in this scope
   c=getchar();
   ^
/in/foo.cc:11:8: error: 'c' was not declared in this scope
  while(c!='\n');
        ^