call Address 其中Address是宏,帮我写一个例子
时间: 2024-04-08 21:34:01 浏览: 55
当您说“call Address”时,我理解您希望调用名为`Address`的宏。在C语言中,宏是通过在代码中进行文本替换来实现的。因此,调用一个宏只需要在代码中使用宏的名称即可。
以下是一个示例,演示如何定义并调用一个名为`Address`的宏:
```c
#include <stdio.h>
#define Address printf("123 Main Street\n")
int main() {
// 调用Address宏
Address;
return 0;
}
```
在这个例子中,我们定义了一个名为`Address`的宏,并在其中使用`printf`来打印地址信息。然后,在`main`函数中,我们通过使用`Address;`来调用该宏。
当您编译并运行上述代码时,它将输出`123 Main Street`作为地址信息。请注意,您可以根据需要修改宏的定义和调用方式。
相关问题
请你写一个例子 介绍address.call() 和 addr.send()这两个方法
好的,我来为您介绍这两个方法。
首先,`address.call()`是Solidity中的一种方法,用于在合约之间调用函数。它可以向另一个合约发送数据,并返回结果。这个方法通常用于调用外部合约的函数,比如Oracle合约。
其次,`addr.send()`是Solidity中的一种方法,用于向指定的地址发送以太币。它可以将以太币转移到其他合约或者账户。这个方法通常用于向其他账户或合约发送以太币,比如交易合约。
下面是一个例子,展示了这两种方法的应用:
```
pragma solidity ^0.8.0;
contract Caller {
address public otherContract;
function setOtherContract(address _address) public {
otherContract = _address;
}
function callOtherContract() public returns (bool) {
bool result = otherContract.call(abi.encodeWithSignature("foo()"));
return result;
}
function sendEther(address payable _address, uint _amount) public {
_address.send(_amount);
}
}
contract OtherContract {
function foo() public returns (bool) {
return true;
}
}
```
在这个例子中,`Caller`合约通过`setOtherContract()`方法设置了另一个合约`OtherContract`的地址,并且在`callOtherContract()`方法中使用`otherContract.call()`调用了`OtherContract`合约的`foo()`函数。这个方法返回了一个布尔值。
同时,在`sendEther()`方法中,`Caller`合约通过`_address.send()`向指定的地址发送了一定数量的以太币。
这就是`address.call()`和`addr.send()`这两个方法的简单应用。
帮我写个java sip电话呼叫的例子
好的,我可以为您提供一个简单的Java SIP电话呼叫的例子,请见以下代码:
```java
import javax.sip.*;
import javax.sip.address.*;
import javax.sip.header.*;
import javax.sip.message.*;
import java.text.*;
import java.util.*;
public class SipPhone {
private static final String myAddress = "192.168.1.100";
private static final int myPort = 5060;
private static final String proxyAddress = "sip.myprovider.com";
private static final int proxyPort = 5060;
private static final String targetAddress = "123.123.123.123";
private static final int targetPort = 5060;
private static final String fromName = "John Smith";
private static final String fromSipAddress = "john.smith@sip.myprovider.com";
private static final String toSipAddress = "jane.doe@sip.anotherprovider.com";
private static final String username = "john.smith";
private static final String password = "secret";
private SipFactory sipFactory;
private SipStack sipStack;
private SipProvider sipProvider;
private HeaderFactory headerFactory;
private AddressFactory addressFactory;
private MessageFactory messageFactory;
private ListeningPoint listeningPoint;
private CallIdHeader callIdHeader;
private CSeqHeader cSeqHeader;
private FromHeader fromHeader;
private ToHeader toHeader;
private ViaHeader viaHeader;
public SipPhone() {
try {
sipFactory = SipFactory.getInstance();
sipFactory.setPathName("gov.nist");
sipStack = sipFactory.createSipStack(properties());
headerFactory = sipFactory.createHeaderFactory();
addressFactory = sipFactory.createAddressFactory();
messageFactory = sipFactory.createMessageFactory();
listeningPoint = sipStack.createListeningPoint(myAddress, myPort, "udp");
sipProvider = sipStack.createSipProvider(listeningPoint);
sipProvider.addSipListener(new SipListener() {
public void processRequest(RequestEvent requestEvent) {
// Process incoming request
}
public void processResponse(ResponseEvent responseEvent) {
// Process incoming response
}
public void processTimeout(TimeoutEvent timeoutEvent) {
// Process timeout
}
public void processIOException(IOExceptionEvent ioExceptionEvent) {
// Process IO exception
}
public void processTransactionTerminated(TransactionTerminatedEvent transactionTerminatedEvent) {
// Process transaction terminated
}
public void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {
// Process dialog terminated
}
});
Address fromAddress = addressFactory.createAddress(fromSipAddress);
fromHeader = headerFactory.createFromHeader(fromAddress, new Random().nextInt(100000) + 1 + "");
ToHeader toHeader = headerFactory.createToHeader(addressFactory.createAddress(toSipAddress), null);
CallIdHeader callIdHeader = sipProvider.getNewCallId();
CSeqHeader cSeqHeader = headerFactory.createCSeqHeader(1L, Request.INVITE);
ViaHeader viaHeader = headerFactory.createViaHeader(myAddress, myPort, "udp", null);
} catch (Exception e) {
e.printStackTrace();
}
}
public void makeCall() {
try {
// Create request
Request request = messageFactory.createRequest("INVITE sip:" + toSipAddress + " SIP/2.0\r\n");
request.addHeader(callIdHeader);
request.addHeader(cSeqHeader);
request.addHeader(fromHeader);
request.addHeader(toHeader);
request.addHeader(viaHeader);
Header contentTypeHeader = headerFactory.createHeader("Content-Type", "application/sdp");
request.addHeader(contentTypeHeader);
// Send request
ClientTransaction clientTransaction = sipProvider.getNewClientTransaction(request);
clientTransaction.sendRequest();
} catch (Exception e) {
e.printStackTrace();
}
}
private Properties properties() {
Properties properties = new Properties();
properties.setProperty("javax.sip.STACK_NAME", "myStack");
properties.setProperty("javax.sip.IP_ADDRESS", myAddress);
properties.setProperty("javax.sip.OUTBOUND_PROXY", proxyAddress + ":" + proxyPort + "/udp");
properties.setProperty("javax.sip.RETRANSMISSION_FILTER", "true");
properties.setProperty("javax.sip.MAX_MESSAGE_SIZE", "1048576");
properties.setProperty("javax.sip.USE_ROUTER_FOR_ALL_URIS", "true");
properties.setProperty("gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS", "false");
return properties;
}
public static void main(String[] args) {
SipPhone sipPhone = new SipPhone();
sipPhone.makeCall();
}
}
```
请注意,此代码仅作为示例,并且假定您已经具备Java和SIP协议的基本知识。您可能需要针对自己的环境更改以下常量:
- myAddress - 您机器的IP地址
- myPort - SIP监听端口
- proxyAddress - 代理服务器的IP地址
- proxyPort - 代理服务器的端口
- targetAddress - 目标SIP地址
- targetPort - 目标SIP端口
- fromName - 发件人名称
- fromSipAddress - 发件人SIP地址
- toSipAddress - 收件人SIP地址
- username - SIP验证用户名
- password - SIP验证密码
请确保您的网络连接正常,代理服务器已配置正确,并且您有权限呼叫目标SIP地址。
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