计算前导0并打印它们

时间:2013-11-05 21:52:21

标签: progress-4gl openedge

我处于需要计算变量的前导0并使用4GL代码将它们放在另一个变量中的情况。

例如,如果变量i(整数)是'00000546'那么

  1. 我需要算上它们,因为它是5
  2. 将它们放在另一个变量b(字符)中,例如'00000'+'546'
  3. 请告诉我。

6 个答案:

答案 0 :(得分:2)

计算前导零的最简单方法:

DEF VAR iNum AS INTEGER NO-UNDO.
DEF VAR cValue AS CHAR NO-UNDO.
DEF VAR iLeadZero AS INTEGER NO-UNDO.

ASSIGN 
  cValue = '00000546'
  iNum = INTEGER(cValue)
  iLeadZero = LENGTH(cValue) - LENGTH(STRING(iNum)). 

也可以作为一个函数完成(没有错误处理):

FUNCTION cntLeadZeros RETURNS INTEGER
    (INPUT pcValue AS CHARACTER):
    DEF VAR iNum AS INTEGER NO-UNDO.
    DEF VAR iLeadZero AS INTEGER NO-UNDO.

    ASSIGN 
      iNum = INTEGER(pcValue)
      iLeadZero = LENGTH(pcValue) - LENGTH(string(iNum)). 

    RETURN iLeadZero.
END FUNCTION. /* cntLeadZeros */

具有错误处理功能,因此如果人们通过非整数值。

FUNCTION cntLeadZeros2 RETURNS INTEGER
    (INPUT pcValue AS CHARACTER):
    DEF VAR iNum AS INTEGER NO-UNDO.
    DEF VAR iLeadZero AS INTEGER NO-UNDO.

    ASSIGN 
      iNum = INTEGER(pcValue)
      iLeadZero = LENGTH(pcValue) - LENGTH(string(iNum)). 

    IF ERROR-STATUS:ERROR THEN
        RETURN ?.

    RETURN iLeadZero.
END FUNCTION. /* cntLeadZeros2 */ 

答案 1 :(得分:1)

好的,所以我是一个整数。需要确定i的格式,用于创建默认字符串,然后将其拆分为零和非零。

这个怎么样:

DEFINE VARIABLE i AS INTEGER     NO-UNDO
    FORMAT "9999999999".

DEFINE VARIABLE vcINoLeading AS CHARACTER   NO-UNDO.
DEFINE VARIABLE vcIDefault AS CHARACTER   NO-UNDO.
DEFINE VARIABLE vcIZeros AS CHARACTER   NO-UNDO.

DEFINE FRAME bogus
    i.

i = 1234.

vcIDefault = STRING(i,i:FORMAT).
vcINoLeading = STRING(i).
vciZeros = REPLACE(vcIDefault,vcINoLeading,"").

MESSAGE vcIDefault SKIP vcINoLeading SKIP vciZeros VIEW-AS ALERT-BOX.

vcINoLeading只有非零数字,vciZeros全部为零。

答案 2 :(得分:0)

这是一种可以完成的方式,遍历字符:

def var a as char no-undo.
def var b as char no-undo.
def var c as char no-undo.
def var v as int  no-undo.

assign a = '00000546'.

do v = 1 to length(a):

   assign c = substring(a,v,1).

   if c ne "0" then leave.

end.

assign b = substring(a,v).

disp fill("0", v - 1) b.

答案 3 :(得分:0)

问题中唯一棘手的部分是他提到“i”是一个整数。因此,前导零必须来自“i”的格式,而不是作为字符串的一部分。值得庆幸的是,我们可以检查“i”的格式并使用它来确定显示的前导零数量。

DEFINE VARIABLE i      AS INTEGER   FORMAT '9999999999' NO-UNDO.
DEFINE VARIABLE cZeros AS CHARACTER FORMAT 'X(9)'       NO-UNDO.

DEFINE FRAME iFrame
    i.

i = 6123455.

cZeros = FILL('0',LENGTH(i:FORMAT) - LENGTH(STRING(i))).

DISPLAY
    i
    cZeros
WITH FRAME iFrame.

答案 4 :(得分:0)

我不明白你为什么要像你描述的那样组装新变量,但你可能有充分的理由。也许你可以解释更多?

无论如何,我应该这样做:

DEFINE VARIABLE a  AS CHARACTER NO-UNDO.
DEFINE VARIABLE nr AS INTEGER   NO-UNDO.
DEFINE VARIABLE b  AS CHARACTER NO-UNDO.

a = STRING(546,"99999999").
nr = LENGTH(a) - LENGTH(LEFT-TRIM(a,"0")).
b = FILL("0",nr) + LEFT-TRIM(a,"0").

MESSAGE a SKIP nr SKIP b
    VIEW-AS ALERT-BOX INFO BUTTONS OK.

答案 5 :(得分:0)

整数数据类型没有前导零,因此您不需要计数零。您可以使用STRING函数执行此操作,如下例所示。在下面的这个例子中,我正在考虑你的字符串有一个固定的长度。

DEFINE VARIABLE i-test  AS INTEGER INITIAL 546.
DEFINE VARIABLE c-test  AS CHARACTER.

ASSIGN c-test = STRING(i-test,"99999999").

MESSAGE c-test VIEW-AS ALERT-BOX.

消息将返回:00000546