public String getType(Symtab st) {
		if (exp1Type.equals("message") || exp2Type.equals("message"))
			return "message";
		if (exp1Type.equals("String") || exp2Type.equals("String"))
			return "String";
		else if (exp1Type.equals("decimal") || exp2Type.equals("decimal"))
			return "decimal";
		else
			return "int";
	}