◆◆0如何使用style更改数字的write输出格式

偶然发现abap中的write语句还有个可以指定数字输出格式的style选项。

F1中的英文帮助截图如下：

可以通过style指定7种格式，这些格式在class CL_ABAP_FORMAT中的属性界面中找到，如下：

1, O_SIMPLE: 输出和su3中用户设定相同数字显示格式，结尾的0不显示
2, O_SIGN_AS_POSTFIX：与O_SIMPLE类似只不过，符号放在右边，正数符号为空
3, O_SCALE_PRESERVING：与O_SIMPLE类似，数字结尾无效的0也显示
4, O_SCIENTIFIC：科学计数法
5, O_SCIENTIFIC_WITH_LEADING_ZERO：带前导零的科学计数法，也就是小数点前是0
6, O_SCALE_PRESERVING_SCIENTIFIC：与O_SCIENTIFIC类似，数字结尾的0也显示
7, O_ENGINEERING：与O_SCIENTIFIC类似，只不过小数点前固定显示3位。

详细参照下面例子程序：

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

REPORT ztest_unit_string_convert LINE-SIZE 255.   DATA: l_conv(132) TYPE c.     "Convert to local format DATA: l_number  TYPE decfloat34 VALUE '-123456789.10'.     WRITE l_number TO l_conv STYLE cl_abap_format=>o_simple LEFT-JUSTIFIED. WRITE:`O_SIMPLE:                        `, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_sign_as_postfix LEFT-JUSTIFIED. WRITE:/ `O_SIGN_AS_POSTFIX:             `, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_scale_preserving LEFT-JUSTIFIED. WRITE:/ `O_SCALE_PRESERVING:            `, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_scientific LEFT-JUSTIFIED. WRITE:/ `O_SCIENTIFIC:                  `, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_scientific_with_leading_zero LEFT-JUSTIFIED. WRITE:/ `O_SCIENTIFIC_WITH_LEADING_ZERO:`, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_scale_preserving_scientific LEFT-JUSTIFIED. WRITE:/ `O_SCALE_PRESERVING_SCIENTIFIC: `, l_conv.   WRITE l_number TO l_conv STYLE cl_abap_format=>o_engineering LEFT-JUSTIFIED. WRITE:/ `O_ENGINEERING:                 `, l_conv.

显示结果：

以上。