//#include <stdlib.h>
//#include <stdio.h>
#include <iostream>
using namespace std;

#include <ace/INET_Addr.h>
#include <ace/SOCK_Connector.h>
#include <ace/SOCK_Stream.h>
#include <ace/SOCK_IO.h>

/*
*
*/
int main(int argc, char** argv) {
//    printf("Hello world!\n");
    ACE_INET_Addr address("127.0.0.1:7777");
    ACE_SOCK_Connector connector;
    ACE_SOCK_Stream stream;
   
    if(connector.connect(stream,address) == -1)
    {
        cout<<strerror(errno)<<endl;
    }


    return (EXIT_SUCCESS);
}

出现如下错误
/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
make[1]: 正在进入目录 `/home/aaa/NetBeansProjects/CppApplication_1'
/usr/bin/make  -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/cppapplication_1
make[2]: 正在进入目录 `/home/aaa/NetBeansProjects/CppApplication_1'
mkdir -p dist/Debug/GNU-Linux-x86
g++     -o dist/Debug/GNU-Linux-x86/cppapplication_1 build/Debug/GNU-Linux-x86/main.o -L/usr/lib
build/Debug/GNU-Linux-x86/main.o: In function `main':
/home/aaa/NetBeansProjects/CppApplication_1/main.cpp:23: undefined reference to `ACE_INET_Addr::ACE_INET_Addr(char const*, int)'
/home/aaa/NetBeansProjects/CppApplication_1/main.cpp:27: undefined reference to `ACE_Addr::sap_any'
/home/aaa/NetBeansProjects/CppApplication_1/main.cpp:27: undefined reference to `ACE_SOCK_Connector::connect(ACE_SOCK_Stream&, ACE_Addr const&, ACE_Time_Value const*, ACE_Addr const&, int, int, int, int)'
/home/aaa/NetBeansProjects/CppApplication_1/main.cpp:32: undefined reference to `ACE_INET_Addr::~ACE_INET_Addr()'
/home/aaa/NetBeansProjects/CppApplication_1/main.cpp:32: undefined reference to `ACE_INET_Addr::~ACE_INET_Addr()'
build/Debug/GNU-Linux-x86/main.o: In function `ACE_SOCK_IO':
/usr/include/ace/SOCK_IO.inl:12: undefined reference to `ACE_SOCK::ACE_SOCK()'
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/cppapplication_1] 错误 1
make[2]:正在离开目录 `/home/aaa/NetBeansProjects/CppApplication_1'
make[1]: *** [.build-conf] 错误 2
make[1]:正在离开目录 `/home/aaa/NetBeansProjects/CppApplication_1'
ation_f
新手，请指点。

看这条信息：collect2: ld returned 1 exit status

很显然是连接阶段错误，一般是找不到库文件：

您可以尝试直接编译：

g++ -oclient client.cpp -lACE

以上假设您的可执行文件名：client，源文件：client.cpp，关键是要连接ACE库

Thank you!