//從左往右移動，如果當前字元為空，而且沒有結束
while (isspace(p[begin]) && p[begin] != 0)
while (isspace(p[end]) && end > 0 )
if (end == 0)
n = end - begin + 1;//非空元素個數
strncpy(outbuf, p + begin, n);
outbuf[n] = 0;
return 0;
}int readcfgfile(char *file, char *key, char *value, int *len)
file *fp = null;
int ret = 0;
char linebuf[1024] = ;
char *p = null;
int flag = 0; //0表示沒有找到
//開啟檔案
fp = fopen(file, "r+");
if (fp == null)
while (1)
//linebuf == "k1 = abc"
//找key
p = strstr(linebuf, key);
if (p == null) //沒有
//重新設定起點
p = p + strlen(key);
//找 "="
p = strstr(p, "=");
if (p == null) //沒有
//重新設定起點
p = p + strlen("=");
//獲取非空字元
ret = trimspace(p, value);
if (ret == 0)//成功
else
}end:
if (fp != null)
if (flag == 0)
return ret;
}int writecfgfile(char *file, char *key, char *value, int len)
file *fp = null;
int ret = 0;
char linebuf[1024] = ;
char buf[size] = ;
char *p = null;
int flag = 0; //0表示沒有找到
fp = fopen(file, "r+");
if (fp == null) //開啟失敗，有可能是配置檔案沒有建立 }
//獲取檔案大小
//游標移動到結尾
fseek(fp, 0, seek_end);
long size = ftell(fp);
if (size >= size)
//游標回到檔案開頭
rewind(fp);
while (1)
//每一行是否包含key
if (strstr(linebuf, key) != null)
else
}//程式到這，2種情況
if (0 == flag) //沒有key
else //有key
fp = fopen(file, "w+");
if (fp == null)
//重新寫內容
fputs(buf, fp);
}end:
if (fp != null)
return ret;
}
#define _crt_secure_no_warnings
#include #include #include #include "cfg.h"
#define cfgname "mycfg.ini"
void menu()
void myread()
; char value[1024] = ;
int len = 0;
int ret = 0;
printf("請輸入key值：");
scanf("%s", key);
ret = readcfgfile(cfgname, key, value, &len);
if (ret != 0)
printf("\n%s對應的value:%s, len = %d\n", key, value, len);
}void mywrite()
; char value[1024] = ;
int len = 0;
int ret = 0;
printf("請輸入key值：");
scanf("%s", key);
printf("請輸入value值：");
scanf("%s", value);
ret = writecfgfile(cfgname, key, value, strlen(value));
if (ret != 0)
printf("\n寫入成功，輸入的是：%s對應的value:%s, len = %d\n", key, value, strlen(value));
}int main(void)
} printf("\n");
system("pause");
return 0;
}
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