/in/foo.cc:11:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main ()
       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:22:27: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'int' [-Wformat=]
   printf ("%s\n",a[i].name),sum++;
                           ^