abap个人笔记——基本语法
IF语句
格式:
IF .
ENDIF.
例子:
PARAMETERS: p1 TYPE i,
p2 TYPE i.
DATA res TYPE i.
IF p1 > p2.
res = p1.
ELSE.
res = p2.
ENDIF.
WRITE:/ res.
parametes :获取用户的键盘输入
write:输出,/换行符
case语句
格式:
CASE .
WHEN .
WHEN .
WHEN OTHERS.
ENDCASE.
例子:
PARAMETERS num TYPE i.
CASE num.
WHEN 1.
WRITE:/ 'num=1'.
WHEN 2.
WRITE:/ 'num=2'.
WHEN OTHERS.
WRITE:/ 'no data'.
ENDCASE.
do语句
格式:
DO TIMES.
ENDDO.
例子:
DATA i TYPE i.
DO 10 TIMES.
i = i + sy-index.
WRITE:/ 'sy-index',sy-index,i.
ENDDO.
WRITE:/ i.
sy-index:系统内置循环次数
tiames:循环次数
while语句
格式:
WHILE .
ENDWHILE.
例子:
DATA i TYPE i VALUE 1.
WHILE i <= 10.
i = i + i.
ENDWHILE.
WRITE:/ i.
计算器
PARAMETERS: sum1 TYPE i,
sum2 TYPE i,
sym TYPE c.
DATA res TYPE i.
CASE sym.
WHEN '+'.
res = sum1 + sum2.
WHEN '-'.
res = sum1 - sum2.
WHEN '*'.
res = sum1 * sum2.
WHEN '/'.
res = sum1 / sum2.
WHEN OTHERS.
ENDCASE.
WRITE:/ res.
求1000以内的所有水仙花数
DATA one TYPE i VALUE 100.
DATA: bai TYPE i,
baishi TYPE i,
shi TYPE i,
shige TYPE i,
ge TYPE i.
WHILE one < 1000.
bai = one / 100.
baishi = one mod 100.
IF baishi > 50.
bai = bai - 1.
ENDIF.
shi = baishi / 10.
shige = baishi mod 10.
IF shige > 5.
shi = shi - 1.
ENDIF.
ge = shige / 1.
IF one = bai * bai * bai + shi * shi * shi + ge * ge * ge.
WRITE:/ '水仙花数为',one.
ENDIF.
one = one + 1.
ENDWHILE.
体重练习题
某体检中心按照“体重指数”对客户的体形进行判断,
体重指数计算如下:体重指数t=体重w/ (身高h^2)(w单位:公斤;h单位:米)
判断依据:
当t < 18 时,体型为“偏瘦”;
当t介于18和25之间时,体型为“正常”;
当t介于25和27之间时,体型为“超重”;
当t >=27时,体型为“肥胖”。
要求:编程从键盘输入你的身高h和体重w,根据给定公式计算体重指数t,然后判断你的体重属于何种类型。
PARAMETERS: h TYPE p DECIMALS 2,
w TYPE i.
DATA: t TYPE i,
h2 TYPE p DECIMALS 2.
h2 = h * h.
t = w / h2.
IF t < 18.
WRITE:/ '当前体型偏瘦'.
ELSEIF 18 < t or t < 25.
WRITE:/ '当前体型正常'.
ELSEIF 25 < t or t < 27.
WRITE:/ '当前体型超重'.
ELSE.
WRITE:/ '当前体型肥胖'.
ENDIF.
post SAP-Garson
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