我的代码是:
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/types.h>
#include <pthread.h>
#include <unistd.h>
#include <semaphore.h>
#include <stdio.h>
#include <signal.h>
#define MAXCLIENTS 20
#define N 5
typedef struct{
int n1;
int n2;
int n3;
int port;
char ip[100];
}Data;
Data* nd;
typedef struct{
int cfd;
struct sockaddr_in client_addr;
}Args;
void catch_sigint(int sig)
{
close(sig);
exit(5);
}
sem_t sem;
pthread_mutex_t mutex;
int* maxSum;
void* connectedClient(void* arg){
Args* a = (Args*)arg;
sem_wait(&sem);
Data* d = (Data*)malloc(sizeof(Data));
recv(a->cfd,d,sizeof(Data),0);
printf("Primul numar: %d\n", d->n1);
printf("Al doilea numar: %d\n", d->n2);
printf("Al treilea numar: %d\n", d->n3);
int currentSum= d->n1 + d->n2 + d->n3;
pthread_mutex_lock(&mutex);
if(currentSum > *maxSum){
printf("Suma curenta este mai mare decat maximul ");
*maxSum= currentSum;
printf("Suma este: %d\n",*maxSum);
nd->n1=d->n1;
nd->n2=d->n2;
nd->n3=d->n3;
nd->port=ntohs(a->client_addr.sin_port);
char* buff;
buff= inet_ntoa(a->client_addr.sin_addr);
strcpy(nd->ip,buff);
}
else
{
printf("Suma curenta nu este mai mare decat maximul");
}
send(a->cfd,nd,sizeof(Data),0);
pthread_mutex_unlock(&mutex);
sem_post(&sem);
}
int main(int argc, char* argv[])
{
pthread_t threads[MAXCLIENTS];
sem_init(&sem,0,N);
pthread_mutex_init(&mutex,NULL);
maxSum = (int*)malloc(sizeof(int));
*maxSum = 0;
nd = malloc(sizeof(Data));
int client_index = 0;
int sfd,cfd;
struct sockaddr_in serv_addr, client_addr;
socklen_t client_len;
signal(SIGINT, catch_sigint);
if((sfd=socket(AF_INET,SOCK_STREAM,0))<0)
{
perror("Eroare la crearea socket!\n");
exit(1);}
}
memset(&serv_addr,'0',sizeof(serv_addr));
serv_addr.sin_family= AF_INET;
serv_addr.sin_port= htons(9000);
serv_addr.sin_addr.s_addr=INADDR_ANY;
if(bind(sfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr))<0)
{
printf("Eroare la bind\n");
exit(2);
}
if(listen(sfd,5)<0)
{
perror("Eroare la listen\n");
exit(3);
}
while(1)
{
client_len=sizeof(client_addr);
if((cfd=accept(sfd,(struct sockaddr*)&client_addr,&client_len))<0)
{
printf("Eroare la accept\n");
exit(4);
}
printf("Clientul este conectat de pe ip %s si portul %d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
Args *a = (Args*) malloc(sizeof(Args));
a->cfd=cfd;
a->client_addr=client_addr;
pthread_create(&threads[client_index],NULL,connectedClient,a);
}
}
使用gcc -pthread ss.c编译后
ss.c:112:9: error: expected declaration specifiers or ‘...’ before ‘&’ token
ss.c:112:20: error: expected declaration specifiers or ‘...’ before '0'
ss.c:112:24: error: expected declaration specifiers or ‘...’ before ‘sizeof’
ss.c:114:11: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
ss.c:115:11: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
ss.c:116:11: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
ss.c:118:2: error: expected identifier or ‘(’ before ‘if’
ss.c:124:2: error: expected identifier or ‘(’ before ‘if’
ss.c:131:2: error: expected identifier or ‘(’ before ‘while’
ss.c:147:1: error: expected identifier or ‘(’ before ‘}’ token
那么有人知道问题是什么吗?我试图搜索第一个错误,但我找不到任何东西。也许编译命令有问题。我忘记了什么吗?
答案 0 :(得分:1)
这里有一个额外的大括号}
:
if((sfd=socket(AF_INET,SOCK_STREAM,0))<0)
{
perror("Eroare la crearea socket!\n");
exit(1);} <--- EXTRA } HERE
}
假设第二个括号是函数的结尾,因此代码的其余部分会产生警告。
答案 1 :(得分:1)
您的代码正上方有一个错误的额外括号}:
if((sfd=socket(AF_INET,SOCK_STREAM,0))<0)
{
perror("Eroare la crearea socket!\n");
exit(1);} // <-- extra } here, remove this
}
memset(&serv_addr,'0',sizeof(serv_addr));
此外,在memset中,您想要0而不是'0',因为'0'是字符0,其ASCII值为48。
在C和C ++中,始终修复第一个错误,然后重新编译并查看剩余的错误。通常,一个小错误会产生一系列错误。