/in/foo.cc:3:1: error: expected ';' before 'int'
 int main()
 ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:18: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",a,b);
                  ^
/in/foo.cc:6:18: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'int' [-Wformat=]