c split 函数 分割字符串 获取指定index的子字符串

char* get_sub_split(char* path,const char* delim,int index)

{

//static const char *delim = ".";

int i = 0;

char* p = strtok(path, delim);

//printf("i=%d,%s\\n", i,p);

if(i==index)

{

return p;

}

i++;

while((p = strtok(NULL, delim))){

//printf("i=%d,%s\\n", i,p);

if(i==index)

{

return p;

}

i++;

}

return NULL;

}

调用示例：

char srcstr[1024]={0};

strcpy(srcstr,"messages.global.Input1=true");

char *p = get_sub_split(srcstr,".",2);

printf("get %dst conten:%s\\n",2,p );

strcpy(srcstr,p);

char srcstr2[1024]={0};

strcpy(srcstr2,p);//由于分割函数会改变源字符串，所以不能使用同一源给多次调用赋值

printf("get %dst conten:%s\\n",0, get_sub_split(srcstr,"=",0));

printf("get %dst conten:%s\\n",1, get_sub_split(srcstr2,"=",1));