新手求助：能不能帮我看看下面的这道题怎么做(⊙o⊙)？

Question

建立PL/SQL块，使用替代变量输入全年工资总额和奖金百分比（10表示10%），输出实际工资总和，如下所示：
Please enter the salary amount: 50000
Please enter the bonus percentage: 10
PL/SQL procedure successfully completed.
G_TOTAL
-------
 55000

Answer 1

set serveroutput ondeclare
 amount number(18,2);
 bonus number;
begin
 amount:=&amount;
 bonus:=&bonus; dbms_output.put_line('G_Totle:'||to_char(amount*(100+bonus)/100,'99999999.99'));
end;
/

Answer 2

SQL> edi
已写入 file afiedt.buf  1  declare
  2  v1 number:=&v1;
  3  per number:=&per;
  4  begin
  5  dbms_output.put_line(to_char(v1*(1+10/100)));
  6* end;
SQL> /
输入 v1 的值:  5000
原值    2: v1 number:=&v1;
新值    2: v1 number:=5000;
输入 per 的值:  10
原值    3: per number:=&per;
新值    3: per number:=10;
5500PL/SQL 过程已成功完成。

Answer 3

SQL> set serverout on
SQL> set verify off
SQL> alter session set nls_language=American;Session altered.SQL> select &salary_amount*(1+&bonus_percentage) g_total from dual;
Enter value for salary_amount: 5000
Enter value for bonus_percentage: 10   G_TOTAL                                                                      
----------                                                                      
     55000                                                                      SQL> spool off;SQL> var a number;
SQL> var b number;
SQL> var G_TOTAL number;
SQL> begin
  2  :a:=&salary_amount;
  3  :b:=&bonus_percentage;
  4  :G_TOTAL:=:a*(1+:b);
  5  end;
  6  /
Enter value for salary_amount: 5000
Enter value for bonus_percentage: 10PL/SQL procedure successfully completed.SQL> print :G_TOTAL;   G_TOTAL                                                                      
----------                                                                      
     55000                                                                      SQL> spool off;