关于strtok函数问题，帮着找找错
char filename[]="C:\\InfoText.txt";
char severaddr[256];
char *p;
//char webset[256]="";
char webset[256]="";
char userid[256]="";
char password[256]="";

FILE *fp=fopen(filename,"r+");
fread(severaddr,1,strlen(severaddr),fp);
p=strtok(severaddr," ");
p=strtok(NULL,"/jsp");
memset(webset,0x00,strlen(webset));
memcpy(webset,p,strlen(p));
//strcpy(webset,p);
/*strtok(NULL,"pwd=");
p=strtok(NULL,"&");
//password=p;
memcpy(password,p,strlen(p));

[解决办法]
strtok()返回值会不会为空，检测下