Odin

package main

import "core:fmt"

main :: proc() {
	program := "+ + * 😃 - /";
	accumulator := 0;

	for token in program {
		switch token {
		case '+': accumulator += 1;
		case '-': accumulator -= 1;
		case '*': accumulator *= 2;
		case '/': accumulator /= 2;
		case '😃': accumulator *= accumulator;
		case: // Ignore everything else
		}
	}

	fmt.printf("The program \"%s\" calculates the value %d\n",
	           program, accumulator);
}