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在客戶端 - 服務器編程中工作時，我在客戶端傳遞了3個字符串，它將被服務器接收，並且應該在那裏打印3次。 （即我已經使用'for'循環，它將分別在客戶端&中執行讀取&寫入操作），但是在服務器中，只有第一個字符串正在打印。爲什麼我無法讀取服務器文件中的多個字符串？
請解釋一下，
這裏是我的代碼
server.c
#include "head.h"
void readstr(int connfd ,char [][20]);
//void writestr(char * ,int);
int main(int c ,char *v[])
{
int sd,connfd,retbind;
struct sockaddr_in serveraddress ,cliaddr;
socklen_t len;
char buf[100] ,databuf[1024][4];
sd =socket(AF_INET ,SOCK_STREAM ,0);
if (sd<0)
{
exit(1);
}
memset(&serveraddress ,0 ,sizeof(serveraddress));
serveraddress.sin_family =AF_INET;
serveraddress.sin_port =htons(MYPORT);
serveraddress.sin_addr.s_addr =htonl(INADDR_ANY);
retbind =bind(sd ,(struct sockaddr*)&serveraddress ,sizeof(serveraddress
));
if(-1 ==retbind)
{
perror("bind fails ");
exit(0);
}
listen(sd ,4);
for(;;)
{
printf("i am waiting for client\n");
len =sizeof(cliaddr);
connfd = accept(sd ,(struct sockaddr*)&cliaddr ,&len);
if(connfd <0)
{
if(errno ==EINTR)
printf("interrupt");
continue;
}
printf("connection from %s\n",inet_ntop(AF_INET ,&cliaddr.sin_addr,buf ,
sizeof(buf)));
readstr(connfd ,databuf);
close(connfd);
printf("\n fini one clieni");
}
return 0;
}
void readstr(int connfd ,char str[3] [20])
{
int pointer=0 ,i=0, n,pos=0;
memset(str ,'\0',sizeof(str));
printf("\n->Connfd : %d\n",connfd);
printf("\n----->String recieved : %s\n",str);
for(i=0;i<3;i++)
{
while((n=read(connfd ,str[i] ,20)) >>0)
{
printf("Looping while\n");
pos =pos +n;
}
str[i][pos] ='\0';
}
for(i=0;i<3;i++)
{
printf("\n%s",str[i]);
}
}
client.c
#include "head.h"
void send1(int ,char*);
int main(int c,char*v[])
{
int sd,i;
int len;
char buf[20][4];
struct sockaddr_in serveraddress;
sd = socket(AF_INET ,SOCK_STREAM ,0);
if (sd<0)
perror("socket");
memset(&serveraddress ,0 ,sizeof(serveraddress));
serveraddress.sin_family =AF_INET;
serveraddress.sin_port =htons(atoi(v[1]));
serveraddress.sin_addr.s_addr =inet_addr(v[2]);
if(connect(sd,(struct sockaddr*)&serveraddress ,sizeof(serveraddress)) <
0)
{
printf("cannot connect to server");
exit(1);
}
for(i=0;i<3;i++)
{
memset(buf ,'\0',sizeof(buf));
printf("\n string");
fgets(buf[i],20,stdin);
len =strlen(buf[i]);
if(buf[i][len] =='\n')
buf[i][len]='\0';
// scanf("%s",buf[i]);
send1(sd ,(char *)buf);
}
shutdown(sd ,SHUT_WR);
}
void send1(int sd ,char *str)
{
int n ,byteswritten =0, wr;
char buf[1024];
strcpy(buf ,str);
n =strlen(buf);
while(byteswritten < n)
{
printf("\nStart writing in client side\n");
wr = write(sd , buf+byteswritten ,(n-byteswritten));
byteswritten+=wr;
}
printf("\n string sent %s" ,buf);
}