Add new function find_data() to separate the instruction from op_code.

src/toy.h

@@ -3,6 +3,7 @@
 
 #include <stdio.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include <stdlib.h>
 
 #define RAM_SIZE 4096 
@@ -11,5 +12,6 @@
 
 int initialise_ram(uint16_t *ram, int argc, char **argv ); 
 uint8_t get_opcode(uint16_t instruction);
+int find_data(uint16_t instruction);
 
 #endif