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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(str);w Str
2、ingUpperCasew 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_To_String_To_Append_To,co
3、nst 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);RemoveSurroundingWhiteSpace(str);SkipWhiteSpaceStrI
4、CmpWithoutSurrWhiteSpace 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 fData100;Fmt(iData,”%100d%100f”,fData);Fmt(string,%s%st#%f,str1,
5、&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/Time)w DateStrw char*DateStr(void);格式：MM-DD-YYYYw TimeStrw char*TimeStr(vo
6、id);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 RenameFile(char Existing_File_Name,char New_File_Name);w i=RenameFile(test1.dat,test2.dat);w Co
7、pyFilew 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*Archive);w i=GetFileAttrs(test.dat,&read,&system,&hidden,&archive);8/11Formatting and I/OFile I/OOpenFileint
8、 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(int File_Handle);ReadFileint ReadFile(int File_Handle,char Buffer,int Count);ReadFile(fp,data,8);WriteFileint WriteFile(int File_Handle,char Buff
9、er,int Count);WriteFile(fp,data,8);ArrayToFileFileToArray9/11ANSI Cstdio.hfopenFILE*fopen(const char File_Name,const char Mode);fp=fopen(test.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,40
10、96,1024,fp);fwritesize_t fwrite(const void*Buffer,size_t Element_Size,size_t Number_of_Elements,FILE*Stream);num=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
11、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_Number);w i=inp(0 x220+4);w j=inp(0 x220+5);w k=j*256+i;w inpww k=inpw(0 x220+4);w inpdw outpw char outp(short Port_Number,char Byte);w i=outp(0 x2c0+5,ch);w outpww outpd
labcvi文件和端口编程ppt课件
