c語言讀寫配置檔案

#include#include#include #define filenm "c:/cfg.ini"

void trim(char *strin, char *strout);//去除字串首位空格
void getvalue(char *keyandvalue, char *key, char *value);
/*define 定義的filenm不能和函式readcfg中的形參filename相同*/ 
void readcfg(const char *filename, const char * key, const char **value);
void getvalue(char *keyandvalue, char *key, char *value)
p += strlen(key);
trim(p, value);
p = strstr(value, "=");
if(p == null)
p+= strlen("=");
trim(p, value);
p = strstr(value, "=");
if(p != null)
p = value;
trim(p, value);
}void readcfg(const char *filename, const char *skey, const char **value), vtemp[1024] = ;
pf = fopen(filename, "r"); //以唯讀方式開啟
while(!feof(pf))
if(strlen(vtemp) != 0) 
else
*value = null;
if(pf != null)
fclose(pf);
}void trim(char *strin, char *strout)
start = temp; //求得頭指標
temp = strin + strlen(strin) - 1; //得到原字串最後乙個字元的指標(不是'\0')
while (*temp == ' ')
end = temp; //求得尾指標
for(strin = start; strin <= end; )
*strout = '\0';
}int writecfg(const char *filename/*in*/, const char *key/*in*/, const char *value/*in*/)會報錯*/
char ftemp[8196] = , fline[1024] = , *fp; //檔案快取陣列
long fsize = 0;
int reg = 0;
int exit = 0;
int i = 0;
pf = fopen(filename, "r+");
if(pf == null)
//獲得檔案大小
fseek(pf, 0, seek_end); // 將檔案指標指向末尾
fsize = ftell(pf);
if(fsize > flen)
fseek(pf, 0, seek_set); //將檔案指標指向開頭
//一行一行的讀，如果存在key則修改value存到快取陣列中
while(!feof(pf))
printf("fline = %s\n", fline);
strcat(ftemp, fline);
}if(exit != 1)
if(pf != null)
fclose(pf);
}end :
if(pf != null)
fclose(pf);
//重新建立乙個以filename命名的檔案
return reg;
}void menu()
int twrite(), value[1024] = ;
printf("請輸入key:");
scanf("%s", key);
printf("請輸入value:");
scanf("%s", value);
printf("\n您輸入的是：%s = %s\n", key, value);
return writecfg(filenm/*in*/,key/*in*/,value/*in*/);
}void tread(), *value;
printf("請輸入key:");
scanf("%s", key);
readcfg(filenm/*in*/,key/*in*/, &value/*out*/);
if(value == null)
printf("\nvalue = %s\n", value);
if(value != null)
}int main()
}system("pause");
return 0;
}

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