typedef?struct?CLIENT{
int?fd;
char?*name;
struct?sockaddr_in?addr;
char?*data;
};
void?process_cli(CLIENT?*client,char?*recvbuf,int?len);
void?savedata(char?*recvbuf,int?len,char?*data);
main(){
int?i,maxi,maxfd,sockfd;
int?nready;
ssize_t?n;
fd_setrset,allset;
int?listenfd,connectfd;
struct?sockaddr_in?server;
CLIENT?client[FD_SETSIZE];
char?recvbuf[MAXDATASIZE];編譯的時候提示：c:22:1: warning: useless storage class specifier in empty declaration?};?^iotcpserver.c:23:18: error: unknown type name ‘CLIENT’?void process_cli(CLIENT *client,char *recvbuf,int len);? ? ? ? ? ? ? ? ? ^iotcpserver.c:26:1: warning: return type defaults to ‘int’ [-Wimplicit-int]?main(){?^iotcpserver.c: In function ‘main’:iotcpserver.c:30:2: error: ‘fd_setrset’ undeclared (first use in this function)? fd_setrset,allset;? ^iotcpserver.c:30:2: note: each undeclared identifier is reported only once for each function it appears iniotcpserver.c:30:13: error: ‘allset’ undeclared (first use in this function)? fd_setrset,allset;? ? ? ? ? ? ?^iotcpserver.c:33:2: error: unknown type name ‘CLIENT’? CLIENT client[FD_SETSIZE];? ^iotcpserver.c:60:12: error: request for member ‘fd’ in something not a structure or union? ?client[i].fd=-1;? ? ? ? ? ? ^iotcpserver.c:67:3: error: ‘rset’ undeclared (first use in this function)? ?rset=allset;? ?^iotcpserver.c:76:17: error: request for member ‘fd’ in something not a structure or union? ? ?if(client[i].fd<0){? ? ? ? ? ? ? ? ?^iotcpserver.c:77:15: error: request for member ‘fd’ in something not a structure or union? ? ? client[i].fd=connectfd;? ? ? ? ? ? ? ?^iotcpserver.c:78:15: error: request for member ‘name’ in something not a structure or union? ? ? client[i].name=new char[MAXDATASIZE];? ? ? ? ? ? ? ?^iotcpserver.c:78:21: error: ‘new’ undeclared (first use in this function)? ? ? client[i].name=new char[MAXDATASIZE];? ? ? ? ? ? ? ? ? ? ?^iotcpserver.c:78:25: error: expected ‘;’ before ‘char’? ? ? client[i].name=new char[MAXDATASIZE];? ? ? ? ? ? ? ? ? ? ? ? ?^iotcpserver.c:79:15: error: request for member ‘addr’ in something not a structure or union? ? ? client[i].addr=addr;? ? ? ? ? ? ? ?^iotcpserver.c:80:15: error: request for member ‘data’ in something not a structure or union? ? ? client[i].data=new char[MAXDATASIZE];? ? ? ? ? ? ? ?^iotcpserver.c:80:25: error: expected ‘;’ before ‘char’? ? ? client[i].data=new char[MAXDATASIZE];? ? ? ? ? ? ? ? ? ? ? ? ?^怎么解決??？
4 回答
qq_莫非
TA貢獻257條經驗 獲得超93個贊
#include?<stdio.h>
#include?<strings.h>
#include?<unistd.h>
#include?<sys/types.h>
#include?<sys/socket.h>
#include?<netinet/in.h>
#include?<arpa/inet.h>
#include?<sys/time.h>
#include?<stdlib.h>
?
#include?<string.h>
?
#define?PORT?1234
#define?BACKLOG?5
#define?MAXDATASIZE?1000
?
typedef?struct?CLIENT{
????int?fd;
????char?*name;
????struct?sockaddr_in?addr;
????char?*data;
};
void?process_cli(CLIENT?*client,char?*recvbuf,int?len);
void?savedata(char?*recvbuf,int?len,char?*data);
?
int?main(){
????int?i,maxi,maxfd,sockfd;
????????CLIENT?client[FD_SETSIZE];
????int?nready;
????ssize_t?n;
????fd_setrset,allset;
????int?listenfd,connectfd;
????struct?sockaddr_in?server;
????char?recvbuf[MAXDATASIZE];
????int?sin_size;
???????
????if((listenfd=socket(AF_INET,SOCK_STREAM,0))==-1){
????????perror("Creating?socket?falied.");
????????exit(1);
????}
????int?opt=SO_REUSEADDR;
????setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
?????
????bzero(&server,sizeof(server));
????server.sin_family=AF_INET;
????server.sin_port=htons(PORT);
????server.sin_addr.s_addr=htonl(INADDR_ANY);
????if(bind(listenfd,(struct?sockaddr?*)&server,sizeof(struct?sockaddr))==1){
????????perror("Bind?error.");
????????exit(1);
????}
????if(listen(listenfd,BACKLOG)==-1){
????????perror("listen()?error.\n");
????????exit(1);
????}
????sin_size=sizeof(struct?sockaddr_in);
????maxfd=listenfd;
????maxi=-1;
????for(i=0;i<FD_SETSIZE;i++){
????????client[i].fd=-1;
????}
????FD_ZERO(&allset);
????FD_SET(listenfd,&allset);
?
????while(1){
????????struct?sockaddr_in?addr;
????????rset=allset;
????????nready=select(maxfd+1,&rset,NULL,NULL,NULL);
?
????????if(FD_ISSET(listenfd,&rset)){
????????????if((connectfd=accept(listenfd,(struct?sockaddr?*)&addr,&sin_size))==-1){
????????????????perror("accept()?error\n");
????????????????continue;
????????????}
????????????for(i=0;i<FD_SETSIZE;i++)
????????????????if(client[i].fd<0){
????????????????????client[i].fd=connectfd;
????????????????????client[i].name=new?char[MAXDATASIZE];
????????????????????????????????????????//client[i].name=(char?*)malloc(MAXDATASIZE);
????????????????????????????????????????//stu[i].name=(char?*)malloc(MAXDATASIZE);
????????????????????client[i].addr=addr;
????????????????????client[i].data=new?char[MAXDATASIZE];
????????????????????????????????????????//stu[i].snum=(char?*)malloc(MAXDATASIZE);
????????????????????client[i].name[0]='\0';
????????????????????client[i].data[0]='\0';
????????????????????????????????????????//stu[i].name[0]='\0';
????????????????????????????????????????//stu[i].snum[0]='\0';
????????????????????printf("You?got?a?connection?from?%s.",inet_ntoa(client[i].addr.sin_addr));
????????????????????break;
????????????????}
????????????????if(i==FD_SETSIZE)
????????????????????printf("too?many?clients\n");
????????????????FD_SET(connectfd,&allset);
????????????????if(connectfd>maxfd)
????????????????????maxfd=connectfd;
????????????????if(i>maxi)
????????????????????maxi=i;
????????????????if(--nready<=0)
????????????????????continue;
????????}
????????for(i=0;i<=maxi;i++){
????????????if((sockfd=client[i].fd)<0))
????????????????continue;
????????????if(FD_ISSET(sockfd,&rset)){
????????????????if((n=recv(sockfd,recvbuf,MAXDATASIZE,0))==0){
????????????????????close(sockfd);
????????????????????printf("Client(%s)?closed?connection.User's?data:%s\n",client[i].name,client[i].data);
????????????????????FD_CLR(sockfd,&allset);
????????????????????client[i].fd=-1;
???????????????????????????????????????//?free(stu[i].name);
????????????????????????????????????????//free(stu[i].data);
????????????????????free(client[i].name);
????????????????????free(client[i].data);
????????????????}else
????????????????????process_cli(&client[i],recvbuf,n);
????????????????if(--nready<=0)
????????????????????break;
????????????????}
????????????}
????????}
????????close(listenfd);
}
?
void?process_cli(CLIENT?*client,char?*recvbuf,int?len){
????char?sendbuf[MAXDATASIZE];
????recvbuf[len-1]='\0';
????if(strlen(client->name)==0){
????????memcpy(client->name,recvbuf,len);
????????printf("Client's?name?is:%s.\n",client->name);
????????return;
????}
????printf("Received?client(%s)?message:%s\n",client->name,recvbuf);
????savedata(recvbuf,len,client->data);
????for(int?i1=0;i1<len-1;i1++){
????????sendbuf[i1]=recvbuf[len-i1-2];
????}
????sendbuf[len-1]='\0';
????send(client->fd,sendbuf,strlen(sendbuf),0);
}
?
void?savedata(char?*recvbuf,int?len,char?*data){
????int?start=strlen(data);
????for(int?i=0;i<len;i++){
????????data[start+i]=recvbuf[i];
????}
}
慕移動6052691
TA貢獻22條經驗 獲得超7個贊
我用VS2008 編譯的，沒有出現你說的問題，是其他報錯；修改后：
#include <winsock2.h>
#pragma comment (lib,"ws2_32.lib")
#define MAXDATASIZE 1024
typedef struct CLIENT{
int fd;
char *name;
struct sockaddr_in addr;
char *data;
};
void process_cli(CLIENT *client,char *recvbuf,int len);
void savedata(char *recvbuf,int len,char *data);
int main(){
int i,maxi,maxfd,sockfd;
int nready;
//ssize_t n;
//fd_setrset,allset;
int listenfd,connectfd;
struct sockaddr_in server;
CLIENT client[FD_SETSIZE];
char recvbuf[MAXDATASIZE];
}
-
qq_莫非我是用的linux操作系統上的gcc
onemoo
TA貢獻883條經驗 獲得超454個贊
如果這是 C 代碼，那么你并沒有把?struct?CLIENT 定義為類型，typedef 的用法沒寫對。
14 行那里?fd_setrset,allset 缺少類型。
還有，看后面的報錯，你寫了?new char[MAXDATASIZE]; 這樣的代碼??？? 你確定你寫的是 C？？
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