本文实例讲述了C语言读写配置文件的方法。分享给大家供大家参考。具体如下:
CException.h如下:
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/************************************************************************/ /* make0000@msn.com */ /************************************************************************/ /************************************************************************/ #include "stdio.h" #include "conio.h" #include "signal.h" #include "setjmp.h" #include "assert.h" #ifdef __cplusplus #include "iostream" #include "exception" extern "C" { #define dllexport __declspec(dllexport) jmp_buf Jmp_Buf; int E; #define Exception 0x00000 #define e Exception #define try if(!(E=setjmp(Jmp_Buf))) #define last_error() E #define catch(val) else #define throw(val) longjmp(Jmp_Buf,val) #define check(expersion) assert(expersion) #define GetError() errno dllexport void sig_usr( int ); dllexport char * getTime(); } #else #define dllexport __declspec(dllexport) jmp_buf Jmp_Buf; int E; #define Exception 0x00000 #define e Exception #define try if(!(E=setjmp(Jmp_Buf))) #define last_error() E #define catch(val) else #define throw(val) longjmp(Jmp_Buf,val) #define check(expersion) assert(expersion) #define GetError() errno dllexport void sig_usr( int ); dllexport char * getTime(); #endif |
File.h如下:
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#include <stdio.h> #include <stdlib.h> #include <string.h> #include <windows.h> #define SIZE 128 #include "CException.h" #define export __declspec(dllexport) //读取配置文件. int read_file( char * filename, char * key, char * value); //写配置文件. int write_file( char * filename, char * key, char * value); //释放文件. int release(); //写入节. int write_section( char * filename, char * section); int read_section( char * filename); int getAuthor( char * value); void getVersion( char * value); |
File.c如下:
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#include "File.h" #include <string.h> int read_file( char * filename, char * key, char * value) { int flag=0; char buffer[SIZE]; FILE *file= fopen (filename, "r" ); try { if (file==NULL) { flag=1; throw (flag); } else { while ( fgets (buffer,SIZE,file)!=NULL) { int i=0,j=0,len= strlen (key); while (buffer[i]!= '\0' ) { if (buffer[i]== '$' &&buffer[i+len+1]== '=' ) { j=i+len+2; while (buffer[j]!= '\0' &&buffer[j]!= ';' ) { int h=0; if (buffer[i+1]==key[i]) { //printf("%c",buffer[j]); value[j-i-len-2]=buffer[j]; } j++; } break ; } else if (buffer[i]== '/' &&buffer[i+1]== '/' ||buffer[i]== ';' ) { break ; //comment } i++; } } } } catch (Exception) { flag=2; fclose (file); printf ( "can't open file %s" ,filename); exit (1); } fflush (file); fclose (file); return flag; } int write_file( char * filename, char * key, char * value) { int flag=0; FILE * file; file= fopen (filename, "a" ); try { if (file==NULL) { flag=1; throw (flag); } fprintf (file, "$%s=%s\n" ,key,value); } catch (Exception) { printf ( "Can't write file %s" ,filename); exit (1); } fflush (file); fclose (file); return flag; } int write_section( char * filename, char * section) { int flag=0; FILE * file=NULL; try { file= fopen (filename, "a" ); if (file!=NULL) { fprintf (file, "[%s]\n" ,section); } else { int flag=1; throw (flag); } } catch (Exception) { printf ( "can't open file %s" ,filename); exit (0); } fflush (file); fclose (file); return flag; } int release() { int flag=1; return flag; } int read_section( char * filename) { return 0; } int getAuthor( char * value) { char author[128]= "武汉软件工程职业学院计算机应用系" ; int i=0; for (i=0;i< strlen (author);i++) { value[i]=author[i]; } return 0; } void getVersion( char * value) { char version[128]= "2009//05//01" ; int i=0; for (i=0;i< strlen (version);i++) { value[i]=version[i]; } } /************************************************************************** void main() { char * str=NULL; char author[120]; char buffer[128]; char buffer1[128]; char buffer2[128]; read_file( "F:\\exercise\\C++!C\\sys.ini" , "password" ,buffer); read_file( "F:\\exercise\\C++!C\\sys.ini" , "username" ,buffer1); read_file( "F:\\exercise\\C++!C\\sys.ini" , "driver" ,buffer2); printf ( "password=%s\n" ,buffer); printf ( "\n" ); printf ( "username=%s\n" ,buffer1); printf ( "\n" ); printf ( "driver=%s\n" ,buffer2); getAuthor(author); printf ( "\n" ); printf ( "author=%s" ,author); release(); } |
希望本文所述对大家的C语言程序设计有所帮助。