PLSQL Procedure

CREATE OR REPLACE PROCEDURE proc_tax(    p1 IN NUMBER,    p2 OUT NUMBER)ISBEGIN  p2 := p1*1.17;END;/

SET serveroutput ONDECLARE  v_input  NUMBER(5);  v_output NUMBER(5);BEGIN  v_input :=1000;  proc_tax(v_input,v_output);  DBMS_OUTPUT.PUT_LINE('課税前金額=' || V_INPUT);  DBMS_OUTPUT.PUT_LINE('課税後金額=' || V_OUTPUT);END;/