/**
 * Interface for an instruction to be executed
 */
public interface Instruction {
	/**
	 * Prints out the text
	 * that represents this SaM instruction
	 */
	String toString();

	/**
	 * Sets the System object for this instruction
	 */
	void setSystem(Sys sys);

	/**
	 * Sets the symbol table this instruction should use
	 */
	public void setTable(SymbolTable st);
	
	/**
	 * Executes the instruction
	 */
	void exec() throws SystemException;
}