急求强制转换

[SCAUniaodan]

char buf[1024];

struct rip
{
char rip_cmd; /* RIP command */
char rip_vers; /* RIP_VERSION, above */
short rip_mbz; /* must be zero */
};

rip *rp;


现在怎样使rp指针指向buf


谢谢！

[sinux_1983]

有何用意呢?

[飞哥]

1楼的就可

[ShardowM]

rp = static_cast<rip*>buf;

[ShardowM]

刚刚写错了

rp = static_cast<rip*>(buf);

[long000]

5L的只在VS2005上能用~~~

[starwalker]

rp = (struct rip *)buf;

[tangshuiling]

楼主是不是想用结构体的成员提取buffer中的数据？？

[Hik_golt]

不理解,用结构体的指针去指向buffer?.. 强制转换也不能随便用的啊..

[zhangxs_3]

rp = (rip*)buf;

[SCAUniaodan]

//发送端程序




#include <stdio.h>
#include <stdlib.h>

#include <winsock.h>
#pragma comment(lib, "wsock32.lib")


int main(int argc, char* argv[])
{
WSADATA wsaData; //指向WinSocket信息结构的指针
SOCKET sockListener;
SOCKADDR_IN sin,saUdpServ;
BOOL fBroadcast = TRUE;
char sendBuff[1024];
int nSize;
int ncount=0;
if(WSAStartup(MAKEWORD( 1, 1 ), &wsaData )!=0)//进行WinSocket的初始化
{
printf("Can't initiates windows socket!Program stop.\n");//初始化失败返回-1
return -1;
}
sockListener=socket(AF_INET,SOCK_DGRAM,0);
setsockopt ( sockListener,SOL_SOCKET,SO_BROADCAST,



(CHAR *)&fBroadcast,sizeof ( BOOL ));
sin.sin_family = AF_INET;
sin.sin_port = htons(0);
sin.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind( sockListener, (SOCKADDR *)&sin, sizeof(sin))!=0)
{
printf("Can't bind socket to local port!Program stop.\n");//初始化失败返回-1
return -1;
}
saUdpServ.sin_family = AF_INET;
saUdpServ.sin_addr.s_addr = htonl (INADDR_BROADCAST);
saUdpServ.sin_port = htons (7001);//发送用的端口，可以根据需要更改
nSize = sizeof (SOCKADDR_IN);
while(1)
{
sprintf(sendBuff,"Message %d",ncount++);
sendto ( sockListener,sendBuff,
lstrlen (sendBuff),
0,
(SOCKADDR *) &saUdpServ,
sizeof ( SOCKADDR_IN ));
printf("%s\n",sendBuff);
}
return 0;
}

[C334745710]

5L好像在VS2005里也不行吧?
提示要用什么reinterpret_cast.....