javaSocket客户端与C服务端通信
转自：http://hi.baidu.com/ssrt_hanbing/blog/item/62e3b934598eeb82a71e1238.html
通过高低位转换。
package com.commnt;
import java.net.*;
import java.io.*;
public class Client {
public String send(String address, int port, String str) {
OutputStream os = null;
DataInputStream is = null;
String look = "";
Socket socket = null;
try {
socket = new Socket(address, port);
os = socket.getOutputStream();
byte[] phone = new byte[str.length()];
phone = ByteUtil.StringtoBytes(phone, str);
os.write(phone);
os.flush();
is = new DataInputStream(socket.getInputStream());
byte[] phone1 = new byte[str.length()];
is.read(phone1);
String strBype = new String(phone1);
look = strBype.toString();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
close(socket, is, os);
}
return look;
}
public void close(Socket socket, DataInputStream is, OutputStream os) {
if (os != null)
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
if (is != null)
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
if (socket != null)
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class ByteUtil
相关文档：
#include <stdio.h>
#include <string.h> /* 程序多次调用biodkey()，应包含头文件bios.h */
#include <bios.h><br>/* 程序多次调用clrscr()，应包含头文件conio.h */
#include <conio.h>
#define MAX 100
#define PAGE 2
#define PRINT1 printf("------------------------------ ......
#include<stdio.h>
#include<math.h>
float x1,x2,disc,p,q;
int main()
{
void greater_than_zero(float,float);
void equal_to_zero(float,float);
void smaller_than_zero(float,float);
float a,b,c;
printf("\ninput a,b,c:");
scanf("%f,%f,%f",&a,&b,&c) ......
extern是C/C++语言中表明函数和全局变量作用范围（可见性）.
它告诉编译器，其声明的函数和变量可以在本模块或其它模块中使用。
1。对于extern变量来说，仅仅是一个变量的声明，其并不是在定义分配内存空间。如果该变量定义多次，会有连接错误
2。通常，在模块的头文件中对本模块提供给其它模块引用的函数和 ......
#include "Stdio.h"
#include "Conio.h"
#include
#define size 81
#define lim 5
#define tstr "ABCDEFGH"
void display(char **p,int i);
void display2(char *p[],int i);
void display3(char (*p)[40],int i);
void testint();
int main(void)
{
testint();
getch();
return 0;
}
test1() ......
