如何解决这个错误Error C2039: 'sprintf_s' : is not a member of '`global namespace''

[liangchaoxi]

拷贝了下面的代码放到VS2010上，却遇到这个C2039 err，怎么解决呀？？


error C2039: 'sprintf_s' : is not a member of '`global namespace''



http://blog.csdn.net/zaffix/article/details/7274627

01.#include <iostream>   
02.#include <WinSock2.h>   
03.  
04.const unsigned short LISTEN_PORT = 8700;  
05.  
06.int main(int argc, char* argv[])  
07.{  
08.    using namespace std;  
09.  
10.    WORD wVersionRequested = MAKEWORD(1, 1);  
11.    WSADATA wsaData;  
12.  
13.    int err = WSAStartup(wVersionRequested, &wsaData);  
14.    if ( 0 != err )  
15.    {  
16.        cout<<"WSAStartup failed. return: "<<err<<endl;  
17.        return -1;  
18.    }  
19.  
20.    if ( wsaData.wVersion != wVersionRequested )  
21.    {  
22.        cout<<"wsaData.wVersion: "<<wsaData.wVersion<<" is not equal to wVersionRequested: "<<wVersionRequested<<endl;  
23.        WSACleanup();  
24.        return -2;  
25.    }  
26.  
27.    SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);  
28.    if ( INVALID_SOCKET == sock )  
29.    {  
30.        cout<<"socket error: "<<WSAGetLastError()<<endl;  
31.        return -3;  
32.    }  
33.  
34.    SOCKADDR_IN addr_server;  
35.    addr_server.sin_family  = AF_INET;  
36.    addr_server.sin_port    = htons(LISTEN_PORT);  
37.    addr_server.sin_addr.S_un.S_addr = htonl(INADDR_ANY);  
38.  
39.    err = bind(sock, (SOCKADDR*)&addr_server, sizeof(addr_server));  
40.    if ( SOCKET_ERROR == err )  
41.    {  
42.        cout<<"bind error: "<<WSAGetLastError()<<endl;  
43.        return -4;  
44.    }  
45.  
46.    err = listen(sock, SOMAXCONN);  
47.    if ( SOCKET_ERROR == err )  
48.    {  
49.        cout<<"listen error: "<<WSAGetLastError()<<endl;  
50.        return -5;  
51.    }  
52.  
53.    cout<<"Start listening on port "<<LISTEN_PORT<<endl;  
54.  
55.    SOCKADDR_IN addr_client;  
56.    int addrlen = sizeof(addr_client);  
57.  
58.    while (true)  
59.    {  
60.        SOCKET sock_con = accept(sock, (SOCKADDR*)&addr_client, &addrlen);  
61.        if ( INVALID_SOCKET != sock_con )  
62.        {  
63.            cout<<inet_ntoa(addr_client.sin_addr)<<":"<<ntohs(addr_client.sin_port)<<" connected!"<<endl;  
64.  
65.            char recv_buf[256];  
66.            char send_buf[512];  
67.  
68.            while (true)  
69.            {  
70.                err = recv(sock_con, recv_buf, sizeof(recv_buf), 0);  
71.                if ( err <= 0 )  
72.                {  
73.                    cout<<"recv error: "<<WSAGetLastError()<<endl;  
74.                    break;  
75.                }  
76.  
77.                sprintf(send_buf, "%s:%d said: %s", inet_ntoa(addr_client.sin_addr), ntohs(addr_client.sin_port), recv_buf);  
78.  
79.                cout<<send_buf<<endl;  
80.  
81.                sprintf(send_buf, "you said: %s", recv_buf);  
82.  
83.                err = send(sock_con, send_buf, strlen(send_buf) + 1, 0);  
84.                if ( SOCKET_ERROR == err )  
85.                {  
86.                    cout<<"send error: "<<WSAGetLastError()<<endl;  
87.                    break;  
88.                }  
89.            }  
90.  
91.            cout<<inet_ntoa(addr_client.sin_addr)<<":"<<ntohs(addr_client.sin_port)<<" left!"<<endl;  
92.  
93.            err = closesocket(sock_con);  
94.            if ( SOCKET_ERROR == err )  
95.            {  
96.                cout<<"closesocket error: "<<WSAGetLastError()<<endl;  
97.            }  
98.        }  
99.        else  
100.        {  
101.            cout<<"accept error: "<<WSAGetLastError()<<endl;  
102.        }  
103.    }  
104.  
105.    WSACleanup();  
106.  
107.    return 0;  
108.}  

[oyljerry]

#include "stdio.h"

[l357630798]

如果添加#include <stdio.h>还是好不了， 会不会前面还有代码使用命名空间，没使用好。

[傻X]

楼主错误是报在现有名称空间找不到对应的函数。 sprintf_s不需要名称空间。载入对应的.h文件就能解决

[liangchaoxi]

引用 3 楼 tiger9991 的回复:

楼主错误是报在现有名称空间找不到对应的函数。 sprintf_s不需要名称空间。载入对应的.h文件就能解决

我这个直接拷贝别人的代码放到编译器 编译的，为什么别人没有报这个错误，而我却报了呢，不解

[zhubo_1117]

楼主要包含<stdio.h>头文件就可以了。