E=mc2
φ(x)
a∗b∗c
#include <cstdio>
int main(){
puts("Hello,world!");
return 0;
}
type _ exp =
| Int : int -> int exp
| Bool : bool -> bool exp
| Eq : ('a exp * 'a exp) -> bool exp
| Add : (int exp * int exp) -> int exp
| If : (bool exp * 'a exp * 'a exp) -> 'a exp
c=a+b;