如何在字符串中加换行

//#include "stdafx.h"//If the vc++6.0, with this line.

#include "stdio.h"

int main(void){

char a[]="1234567890",b[]="abcdefg"

printf("不添换行符:\n%s%s\n",a,b)

printf("不添换行符:\n%s\n%s\n",a,b)

return 0

}

c 语言程序。假定在 s[3] 这里插入 换行符，可以把这个点以后的字符串后推一格，再填入换行符。

#include <stdio.h>

int main(){

char s[20]="ABCDEFGHIJK"

int n=3 //insert location

int i

strcpy(s+n+1,&s[n]) // 后推一格

s[n]='\n' // 填入换行符

printf("%s",s)

return 0

}

输出：ABC

DDFGHHJK

字符串加回车换行TAB符号

所有字符在下面的类中：

cl_abap_char_utilities=>horizontal_tab — 09

cl_abap_char_utilities=>CR_LF ———- 0D0A

cl_abap_char_utilities=>VERTICAL_TAB — 0B

cl_abap_char_utilities=>NEWLINE —- 0A

cl_abap_char_utilities=>FORM_FEED —- 0C

cl_abap_char_utilities=>BACKSPACE — 08

如果是要单独取得回车或者换行（不是回车加换行），可以采用：

cl_abap_char_utilities=>CR_LF(1)

cl_abap_char_utilities=>CR_LF 1(1)

从EXCEl文件中传上的文件的回车符就是cl_abap_char_utilities=>CR_LF 1(1)

DATA: crlf(2) TYPE c.

crlf = cl_ABAP_char_utilities=>cr_lf. "换行符

在字符串中加入回车换行或TAB字符，在其他语言可以使用$13$10的ASCII码进行插入.而在abap里却出错,为了解决此问题,请使用sap的类CL_ABAP_CHAR_UTILITIES.

CL_ABAP_CHAR_UTILITIES中有字符常量:如:CR_LF,HORIZONTAL_TAB,NEWLINE等等.

例:

DATA: crlf(2) TYPE c.

DATA: l_html(4096) TYPE C.

crlf = cl_ABAP_char_utilities=>cr_lf.

CONCATENATE l_html crlf '_FUNCTION'

'30'

'WWW_GET_REPORT' '>' INTO l_html.

----

调用方法产生文件路径对话框

DATA: p_file LIKE rlgrap-filename.

FIELD-SYMBOLS <fs>TYPE file_table.

FIELD-SYMBOLS <f>.

DATA: f_table TYPE filetable.

DATA: rc TYPE i.

DATA: user_action TYPE i.

DATA: l_index TYPE i.

CALL METHOD cl_gui_frontend_services=>file_open_dialog

EXPORTING

window_title = '请选择要汇入的文件'

file_filter = 'Excel files (*.XLS)|*.XLS'

initial_directory = 'D:\'

CHANGING

file_table = f_table

rc = rc

user_action = user_action

EXCEPTIONS

cntl_error = 1

file_open_dialog_failed = 2

error_no_gui = 3.

CALL METHOD cl_gui_cfw=>flush

EXCEPTIONS cntl_system_error = 1

cntl_error = 2.

CLEAR p_file.

READ TABLE f_table ASSIGNING <fs>INDEX 1.

IF sy-subrc = 0.

p_file = <fs>-filename.

ENDIF.

---