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
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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);
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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();
}
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希望本文所述对大家的C语言程序设计有所帮助。