labcvi文件和端口编程ppt课件

1、MSN: qiaoliyanmsnMSN: qiaoliyanmsn在在线交流）线交流）Tel: 86413532 ext. 8611 Tel: 86413532 ext. 8611 （逸夫楼（逸夫楼611611）2/11w 字符串操作w Formatting and I/OString Manipulationw StringLengthw int StringLength (char String);w i = StringLength (str);w StringLowerCasew void StringLowerCase (char String);w StringLowerCase

2、 (str);w StringUpperCasew CompareStringw int CompareStrings (char String_#1, int String_#1_Index, char String_#2, int String_#2_Index, int Case_Sensitive?);w i = CompareStrings (str1, ind1, str2, ind2, 0);w CopyStringw 3/11Programmers ToolboxString HandlingAppendStringint AppendString (char *Pointer

3、_To_String_To_Append_To, const char String_To_Append, int Num_Characters_To_Append);AppendString (str1, str2, -1);StrDupchar *StrDup (const char String_To_Duplicate);str = StrDup (virtual instrumentation lesson);RemoveSurroundingWhiteSpacevoid RemoveSurroundingWhiteSpace (char String);RemoveSurround

4、ingWhiteSpace (str);SkipWhiteSpaceStrICmpWithoutSurrWhiteSpace 4/11w 数据格式化(Data Formatting)w Fmt 将一个或多个源数据item格式化到一个目标数据变量中 w int Fmt (void *Target, char Format_String, .);w Fmt (str, %s%d, &i);w 格式符w %s字符串w %d, %i 整型w %f浮点型w %10f 浮点型数组5/11 修饰符 修饰符：wn, tn, t#, pn, bn 举例 int iData100; float fData

5、100; Fmt(iData, ”%100d%100f”, fData); Fmt(string,%s%st#%f,str1,&value); Fmtwizard6/11w 定时/等待(Timer/Wait)w Timerw double Timer (void)w Delayw void Delay (double Number_of_Seconds);w Delay(3.0);w SyncWaitw void SyncWait (double Begin_Time, double Interval);w SyncWait(mark, interval);w 日期/时间(Date/T

6、ime)w DateStrw char *DateStr (void); 格式：MM-DD-YYYYw TimeStrw char *TimeStr (void); 格式：HH:MM:SSw GetSystemTimew int GetSystemTime (int *Hours, int *Minutes, int *Seconds);7/11w 文件应用w UtilitiesFile Utilitiesw DeleteFilew int DeleteFile (char File_Name);w i = DeleteFile (*.doc);w RenameFilew int Rename

7、File (char Existing_File_Name, char New_File_Name);w i = RenameFile (test1.dat, test2.dat);w CopyFilew int CopyFile (char Source_File_Name, char Target_File_Name);w i = CopyFile (“test1.dat”, “test2.dat”);w GetFileAttrsw int GetFileAttrs (char File_Name, int *Read-Only, int *System, int *Hidden, int

8、 *Archive);w i = GetFileAttrs (test.dat, &read, &system, &hidden, &archive);8/11Formatting and I/OFile I/OOpenFileint OpenFile (char File_Name, int Read/Write_Mode, int Action, int File_Type)fp = OpenFile (test.dat, VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_BINARY);CloseFileint CloseFile (i

9、nt File_Handle);ReadFileint ReadFile (int File_Handle, char Buffer, int Count);ReadFile (fp, data, 8);WriteFileint WriteFile (int File_Handle, char Buffer, int Count);WriteFile (fp, data, 8);ArrayToFileFileToArray9/11ANSI Cstdio.hfopenFILE *fopen (const char File_Name, const char Mode);fp = fopen (t

10、est.dat, wb+);fcloseint fclose (FILE *Stream);i = fclose (fp);freadsize_t fread (void *Buffer, size_t Element_Size, size_t Number_of_Elements, FILE *Stream);num = fread (data, 4096, 1024, fp);fwritesize_t fwrite (const void *Buffer, size_t Element_Size, size_t Number_of_Elements, FILE *Stream);num =

11、 fwrite (data, 4096, 1024, fp);ftelllong ftell (FILE *Stream);pos = ftell (fp);fseekint fseek (FILE *Stream, long Offset, int Origin);i = fseek (fp, 256, SEEK_SET);10/11w 路径应用(Directory Utilities)w GetDirw int GetDir (char Current_Directory);w i = GetDir (dir);w SetDirw DeleteDirw int DeleteDir (char Directory_Name);w i = DeleteDir (d:testdata);w MakeDirw int MakeDir (char Directory_Name);w i = MakeDir (d:testdata);w GetProjectDirw int GetProjectDir (char Directory_Name);w i = GetProjectDir (dir);w 11/11w IO端口(Port IO)w inpw char inp (short Port_N