\u6458\u8981：\u672c\u6587\u7cfb\u7edf\u68b3\u7406 C++ \u5f02\u5e38\u5904\u7406\u673a\u5236，\u4ece\u5f02\u5e38\u7684\u57fa\u672c\u6982\u5ff5\u4e0e C \u8bed\u8a00\u9519\u8bef\u7801\u7684\u5bf9\u6bd4\u51fa\u53d1，\u4f9d\u6b21\u8bb2\u89e3\u5f02\u5e38\u7684\u629b\u51fa\u4e0e\u6355\u83b7\u3001\u6808\u5c55\u5f00\u3001\u5339\u914d\u89c4\u5219\u3001\u5f02\u5e38\u91cd\u65b0\u629b\u51fa\u3001\u5f02\u5e38\u5b89\u5168\u95ee\u9898\u4ee5\u53ca\u5f02\u5e38\u89c4\u8303，\u5e76\u7ed3\u5408\u6807\u51c6\u5e93\u5f02\u5e38\u4f53\u7cfb\u7ed9\u51fa\u5b8c\u6574\u53ef\u8fd0\u884c\u7684\u4ee3\u7801\u793a\u4f8b，\u5e2e\u52a9\u8bfb\u8005\u5efa\u7acb\u5bf9 C++ \u5f02\u5e38\u5904\u7406\u7684\u6574\u4f53\u8ba4\u77e5\u3002<\/p>\n
\u5f02\u5e38\u5904\u7406\u673a\u5236\u5141\u8bb8\u7a0b\u5e8f\u4e2d\u72ec\u7acb\u5f00\u53d1\u7684\u90e8\u5206，\u5728\u8fd0\u884c\u65f6\u5bf9\u51fa\u73b0\u7684\u95ee\u9898\u8fdb\u884c\u901a\u4fe1\u5e76\u505a\u51fa\u76f8\u5e94\u7684\u5904\u7406\u3002\u5f02\u5e38\u4f7f\u5f97\u6211\u4eec\u80fd\u591f\u5c06\u95ee\u9898\u7684\u68c0\u6d4b\u4e0e\u95ee\u9898\u7684\u89e3\u51b3\u8fc7\u7a0b\u5206\u5f00：\u7a0b\u5e8f\u7684\u4e00\u90e8\u5206\u8d1f\u8d23\u68c0\u6d4b\u95ee\u9898\u7684\u51fa\u73b0，\u7136\u540e\u628a\u89e3\u51b3\u95ee\u9898\u7684\u4efb\u52a1\u4f20\u9012\u7ed9\u7a0b\u5e8f\u7684\u53e6\u4e00\u90e8\u5206，\u68c0\u6d4b\u73af\u8282\u65e0\u987b\u77e5\u9053\u95ee\u9898\u5904\u7406\u6a21\u5757\u7684\u6240\u6709\u7ec6\u8282\u3002<\/p>\n
C \u8bed\u8a00\u4e3b\u8981\u901a\u8fc7\u9519\u8bef\u7801\u7684\u5f62\u5f0f\u5904\u7406\u9519\u8bef\u3002\u9519\u8bef\u7801\u672c\u8d28\u5c31\u662f\u5bf9\u9519\u8bef\u4fe1\u606f\u8fdb\u884c\u5206\u7c7b\u7f16\u53f7，\u62ff\u5230\u9519\u8bef\u7801\u4ee5\u540e\u8fd8\u8981\u53bb\u67e5\u8be2\u9519\u8bef\u4fe1\u606f，\u6bd4\u8f83\u9ebb\u70e6\u3002\u800c\u5f02\u5e38\u662f\u629b\u51fa\u4e00\u4e2a\u5bf9\u8c61，\u8fd9\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u643a\u5e26\u66f4\u5168\u9762\u7684\u5404\u79cd\u4fe1\u606f\u3002<\/p>\n
\u7a0b\u5e8f\u51fa\u73b0\u95ee\u9898\u65f6，\u6211\u4eec\u901a\u8fc7\u629b\u51fa（throw）\u4e00\u4e2a\u5bf9\u8c61\u6765\u5f15\u53d1\u4e00\u4e2a\u5f02\u5e38，\u8be5\u5bf9\u8c61\u7684\u7c7b\u578b\u4ee5\u53ca\u5f53\u524d\u7684\u8c03\u7528\u94fe\u51b3\u5b9a\u4e86\u5e94\u8be5\u7531\u54ea\u4e2a catch \u7684\u5904\u7406\u4ee3\u7801\u6765\u5904\u7406\u8be5\u5f02\u5e38\u3002<\/p>\n
\u8fd9\u91cc\u8fd8\u6709\u4e24\u4e2a\u91cd\u8981\u7684\u542b\u4e49：<\/p>\n
\u629b\u51fa\u5f02\u5e38\u5bf9\u8c61\u540e，\u4f1a\u751f\u6210\u4e00\u4e2a\u5f02\u5e38\u5bf9\u8c61\u7684\u62f7\u8d1d\u3002\u56e0\u4e3a\u629b\u51fa\u7684\u5f02\u5e38\u5bf9\u8c61\u53ef\u80fd\u662f\u4e00\u4e2a\u5c40\u90e8\u5bf9\u8c61，\u6240\u4ee5\u4f1a\u751f\u6210\u4e00\u4e2a\u62f7\u8d1d\u5bf9\u8c61，\u8fd9\u4e2a\u62f7\u8d1d\u7684\u5bf9\u8c61\u4f1a\u5728 catch \u5b50\u53e5\u540e\u9500\u6bc1（\u8fd9\u91cc\u7684\u5904\u7406\u7c7b\u4f3c\u4e8e\u51fd\u6570\u7684\u4f20\u503c\u8fd4\u56de）\u3002<\/p>\n
\u629b\u51fa\u5f02\u5e38\u540e，\u7a0b\u5e8f\u6682\u505c\u5f53\u524d\u51fd\u6570\u7684\u6267\u884c，\u5f00\u59cb\u5bfb\u627e\u4e0e\u4e4b\u5339\u914d\u7684 catch \u5b50\u53e5：<\/p>\n
\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u9664\u96f6\u5f02\u5e38\u7684\u4f8b\u5b50，\u89c2\u5bdf\u5f02\u5e38\u5728\u4e0d\u540c\u8c03\u7528\u5c42\u7ea7\u4e4b\u95f4\u5982\u4f55\u4f20\u9012：<\/p>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\n
double Divide(int a, int b)
\n{
\n try
\n {
\n \/\/ \u5f53 b == 0 \u65f6\u629b\u51fa\u5f02\u5e38
\n if (b == 0)
\n {
\n string s("Divide by zero condition!");
\n throw s;
\n }
\n else
\n {
\n return ((double)a \/ (double)b);
\n }
\n }
\n catch (int errid)
\n {
\n cout << errid << endl;
\n }
\n return 0;
\n}<\/p>\n
void Func()
\n{
\n int len, time;
\n cin >> len >> time;
\n try
\n {
\n cout << Divide(len, time) << endl;
\n }
\n catch (const char* errmsg)
\n {
\n cout << errmsg << endl;
\n }
\n cout << __FUNCTION__ << ":" << __LINE__ << "\u884c\u6267\u884c" << endl;
\n}<\/p>\n
int main()
\n{
\n while (1)
\n {
\n try
\n {
\n Func();
\n }
\n catch (const string& errmsg)
\n {
\n cout << errmsg << endl;
\n }
\n }
\n return 0;
\n} <\/p>\n
\u5728 Divide \u4e2d\u629b\u51fa\u7684\u662f string \u7c7b\u578b\u5bf9\u8c61，\u672c\u5c42\u7684 catch(int) \u4e0e Func \u4e2d\u7684 catch(const char*) \u90fd\u65e0\u6cd5\u5339\u914d，\u6700\u7ec8\u7531 main \u4e2d\u7684 catch(const string&) \u6355\u83b7，\u8fd9\u6b63\u662f\u6808\u5c55\u5f00\u7684\u5178\u578b\u8fc7\u7a0b\u3002<\/p>\n
\u4e00\u822c\u60c5\u51b5\u4e0b，\u629b\u51fa\u5bf9\u8c61\u548c catch \u662f\u7c7b\u578b\u5b8c\u5168\u5339\u914d\u7684；\u5982\u679c\u6709\u591a\u4e2a\u7c7b\u578b\u5339\u914d\u7684，\u5c31\u9009\u62e9\u79bb\u5b83\u4f4d\u7f6e\u66f4\u8fd1\u7684\u90a3\u4e2a\u3002\u4f46\u4e5f\u6709\u4e00\u4e9b\u4f8b\u5916，\u5141\u8bb8\u4ee5\u4e0b\u8f6c\u6362：<\/p>\n
\u5982\u679c\u5230 main \u51fd\u6570，\u5f02\u5e38\u4ecd\u65e7\u6ca1\u6709\u88ab\u5339\u914d\u5c31\u4f1a\u7ec8\u6b62\u7a0b\u5e8f\u3002\u4e0d\u662f\u53d1\u751f\u4e25\u91cd\u9519\u8bef\u7684\u60c5\u51b5\u4e0b，\u6211\u4eec\u662f\u4e0d\u671f\u671b\u7a0b\u5e8f\u7ec8\u6b62\u7684，\u6240\u4ee5\u4e00\u822c main \u51fd\u6570\u4e2d\u6700\u540e\u90fd\u4f1a\u4f7f\u7528 catch(…)，\u5b83\u53ef\u4ee5\u6355\u83b7\u4efb\u610f\u7c7b\u578b\u7684\u5f02\u5e38，\u4f46\u662f\u4e0d\u77e5\u9053\u5f02\u5e38\u9519\u8bef\u662f\u4ec0\u4e48\u3002<\/p>\n
\u4e0b\u9762\u6a21\u62df\u4e00\u4e2a\u670d\u52a1\u7684\u51e0\u4e2a\u6a21\u5757，\u6bcf\u4e2a\u6a21\u5757\u7684\u5f02\u5e38\u7c7b\u90fd\u7ee7\u627f\u81ea Exception，\u6700\u540e\u7edf\u4e00\u6355\u83b7\u57fa\u7c7b：<\/p>\n
#include <iostream>
\n#include <string>
\n#include <thread>
\n#include <chrono>
\n#include <cstdlib>
\nusing namespace std;<\/p>\n
\/\/ \u4e00\u822c\u5927\u578b\u9879\u76ee\u7a0b\u5e8f\u624d\u4f1a\u4f7f\u7528\u5f02\u5e38，\u4e0b\u9762\u6211\u4eec\u6a21\u62df\u8bbe\u8ba1\u4e00\u4e2a\u670d\u52a1\u7684\u51e0\u4e2a\u6a21\u5757
\n\/\/ \u6bcf\u4e2a\u6a21\u5757\u7684\u7ee7\u627f\u90fd\u662f Exception \u7684\u6d3e\u751f\u7c7b，\u6bcf\u4e2a\u6a21\u5757\u53ef\u4ee5\u6dfb\u52a0\u81ea\u5df1\u7684\u6570\u636e
\n\/\/ \u6700\u540e\u6355\u83b7\u65f6，\u6211\u4eec\u6355\u83b7\u57fa\u7c7b\u5c31\u53ef\u4ee5
\nclass Exception
\n{
\npublic:
\n Exception(const string& errmsg, int id)
\n : _errmsg(errmsg)
\n , _id(id)
\n {}<\/p>\n
virtual string what() const
\n {
\n return _errmsg;
\n }<\/p>\n
int getid() const
\n {
\n return _id;
\n }<\/p>\n
protected:
\n string _errmsg;
\n int _id;
\n};<\/p>\n
class SqlException : public Exception
\n{
\npublic:
\n SqlException(const string& errmsg, int id, const string& sql)
\n : Exception(errmsg, id)
\n , _sql(sql)
\n {}<\/p>\n
virtual string what() const
\n {
\n string str = "SqlException:";
\n str += _errmsg;
\n str += "->";
\n str += _sql;
\n return str;
\n }<\/p>\n
private:
\n const string _sql;
\n};<\/p>\n
class CacheException : public Exception
\n{
\npublic:
\n CacheException(const string& errmsg, int id)
\n : Exception(errmsg, id)
\n {}<\/p>\n
virtual string what() const
\n {
\n string str = "CacheException:";
\n str += _errmsg;
\n return str;
\n }
\n};<\/p>\n
class HttpException : public Exception
\n{
\npublic:
\n HttpException(const string& errmsg, int id, const string& type)
\n : Exception(errmsg, id)
\n , _type(type)
\n {}<\/p>\n
virtual string what() const
\n {
\n string str = "HttpException:";
\n str += _type;
\n str += ":";
\n str += _errmsg;
\n return str;
\n }<\/p>\n
private:
\n const string _type;
\n};<\/p>\n
void SQLMgr()
\n{
\n if (rand() % 7 == 0)
\n {
\n throw SqlException("\u6743\u9650\u4e0d\u8db3", 100, "select * from name = '\u5f20\u4e09'");
\n }
\n else
\n {
\n cout << "SQLMgr \u8c03\u7528\u6210\u529f" << endl;
\n }
\n}<\/p>\n
void CacheMgr()
\n{
\n if (rand() % 5 == 0)
\n {
\n throw CacheException("\u6743\u9650\u4e0d\u8db3", 100);
\n }
\n else if (rand() % 6 == 0)
\n {
\n throw CacheException("\u6570\u636e\u4e0d\u5b58\u5728", 101);
\n }
\n else
\n {
\n cout << "CacheMgr \u8c03\u7528\u6210\u529f" << endl;
\n }
\n SQLMgr();
\n}<\/p>\n
void HttpServer()
\n{
\n if (rand() % 3 == 0)
\n {
\n throw HttpException("\u8bf7\u6c42\u8d44\u6e90\u4e0d\u5b58\u5728", 100, "get");
\n }
\n else if (rand() % 4 == 0)
\n {
\n throw HttpException("\u6743\u9650\u4e0d\u8db3", 101, "post");
\n }
\n else
\n {
\n cout << "HttpServer \u8c03\u7528\u6210\u529f" << endl;
\n }
\n CacheMgr();
\n}<\/p>\n
int main()
\n{
\n srand(time(0));
\n while (1)
\n {
\n this_thread::sleep_for(chrono::seconds(1));
\n try
\n {
\n HttpServer();
\n }
\n catch (const Exception& e) \/\/ \u8fd9\u91cc\u6355\u83b7\u57fa\u7c7b，\u57fa\u7c7b\u5bf9\u8c61\u548c\u6d3e\u751f\u7c7b\u5bf9\u8c61\u90fd\u53ef\u4ee5\u88ab\u6355\u83b7
\n {
\n cout << e.what() << endl;
\n }
\n catch (…)
\n {
\n cout << "Unkown Exception" << endl;
\n }
\n }
\n return 0;
\n} <\/p>\n
\u6709\u65f6 catch \u5230\u4e00\u4e2a\u5f02\u5e38\u5bf9\u8c61\u540e，\u9700\u8981\u5bf9\u9519\u8bef\u8fdb\u884c\u5206\u7c7b：\u5176\u4e2d\u7684\u67d0\u79cd\u5f02\u5e38\u9519\u8bef\u9700\u8981\u8fdb\u884c\u7279\u6b8a\u7684\u5904\u7406，\u5176\u4ed6\u9519\u8bef\u5219\u91cd\u65b0\u629b\u51fa\u5f02\u5e38\u7ed9\u5916\u5c42\u8c03\u7528\u94fe\u5904\u7406\u3002\u6355\u83b7\u5f02\u5e38\u540e\u9700\u8981\u91cd\u65b0\u629b\u51fa，\u76f4\u63a5 throw; \u5c31\u53ef\u4ee5\u628a\u6355\u83b7\u7684\u5bf9\u8c61\u76f4\u63a5\u629b\u51fa\u3002<\/p>\n
\u4e0b\u9762\u7684\u7a0b\u5e8f\u6a21\u62df\u4e86\u804a\u5929\u65f6\u53d1\u9001\u6d88\u606f\u7684\u573a\u666f：\u53d1\u9001\u5931\u8d25\u4f1a\u6355\u83b7\u5f02\u5e38，\u4f46\u53ef\u80fd\u5728\u7535\u68af\u3001\u5730\u4e0b\u5ba4\u7b49\u573a\u666f\u624b\u673a\u4fe1\u53f7\u4e0d\u597d，\u5219\u9700\u8981\u591a\u6b21\u5c1d\u8bd5；\u5982\u679c\u591a\u6b21\u5c1d\u8bd5\u90fd\u53d1\u9001\u4e0d\u51fa\u53bb，\u5c31\u9700\u8981\u6355\u83b7\u5f02\u5e38\u518d\u91cd\u65b0\u629b\u51fa\u3002\u5176\u6b21\u5982\u679c\u4e0d\u662f\u7f51\u7edc\u5dee\u5bfc\u81f4\u7684\u9519\u8bef，\u6355\u83b7\u540e\u4e5f\u8981\u91cd\u65b0\u629b\u51fa\u3002<\/p>\n
#include <iostream>
\n#include <string>
\n#include <cstdlib>
\nusing namespace std;<\/p>\n
void _SendMsg(const string& s)
\n{
\n if (rand() % 2 == 0)
\n {
\n throw HttpException("\u7f51\u7edc\u4e0d\u7a33\u5b9a，\u53d1\u9001\u5931\u8d25", 102, "put");
\n }
\n else if (rand() % 7 == 0)
\n {
\n throw HttpException("\u4f60\u5df2\u7ecf\u4e0d\u662f\u5bf9\u8c61\u7684\u597d\u53cb，\u53d1\u9001\u5931\u8d25", 103, "put");
\n }
\n else
\n {
\n cout << "\u53d1\u9001\u6210\u529f" << endl;
\n }
\n}<\/p>\n
void SendMsg(const string& s)
\n{
\n \/\/ \u53d1\u9001\u6d88\u606f\u5931\u8d25，\u5219\u518d\u91cd\u8bd5 3 \u6b21
\n for (size_t i = 0; i < 4; i++)
\n {
\n try
\n {
\n _SendMsg(s);
\n break;
\n }
\n catch (const Exception& e)
\n {
\n \/\/ \u6355\u83b7\u5f02\u5e38，if \u4e2d\u662f 102 \u53f7\u9519\u8bef，\u7f51\u7edc\u4e0d\u7a33\u5b9a，\u5219\u91cd\u65b0\u53d1\u9001
\n \/\/ \u6355\u83b7\u5f02\u5e38，else \u4e2d\u4e0d\u662f 102 \u53f7\u9519\u8bef，\u5219\u5c06\u5f02\u5e38\u91cd\u65b0\u629b\u51fa
\n if (e.getid() == 102)
\n {
\n \/\/ \u91cd\u8bd5\u4e09\u6b21\u4ee5\u540e\u8fd8\u5931\u8d25\u4e86，\u5219\u8bf4\u660e\u7f51\u7edc\u592a\u5dee\u4e86，\u91cd\u65b0\u629b\u51fa\u5f02\u5e38
\n if (i == 3)
\n throw;
\n cout << "\u5f00\u59cb\u7b2c" << i + 1 << "\u6b21\u91cd\u8bd5" << endl;
\n }
\n else
\n {
\n throw;
\n }
\n }
\n }
\n}<\/p>\n
int main()
\n{
\n srand(time(0));
\n string str;
\n while (cin >> str)
\n {
\n try
\n {
\n SendMsg(str);
\n }
\n catch (const Exception& e)
\n {
\n cout << e.what() << endl << endl;
\n }
\n catch (…)
\n {
\n cout << "Unkown Exception" << endl;
\n }
\n }
\n return 0;
\n} <\/p>\n
\u5f02\u5e38\u629b\u51fa\u540e，\u540e\u9762\u7684\u4ee3\u7801\u5c31\u4e0d\u518d\u6267\u884c\u3002\u5982\u679c\u524d\u9762\u7533\u8bf7\u4e86\u8d44\u6e90（\u5185\u5b58\u3001\u9501\u7b49），\u540e\u9762\u8fdb\u884c\u91ca\u653e，\u4f46\u4e2d\u95f4\u53ef\u80fd\u4f1a\u629b\u5f02\u5e38，\u5c31\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6ca1\u6709\u91ca\u653e，\u8fd9\u91cc\u7531\u4e8e\u5f02\u5e38\u5c31\u5f15\u53d1\u4e86\u8d44\u6e90\u6cc4\u6f0f，\u4ea7\u751f\u5b89\u5168\u6027\u7684\u95ee\u9898\u3002\u4e2d\u95f4\u6211\u4eec\u9700\u8981\u6355\u83b7\u5f02\u5e38，\u91ca\u653e\u8d44\u6e90\u540e\u518d\u91cd\u65b0\u629b\u51fa；\u5f53\u7136，\u540e\u9762\u667a\u80fd\u6307\u9488\u7ae0\u8282\u8bb2\u7684 RAII \u65b9\u5f0f\u89e3\u51b3\u8fd9\u79cd\u95ee\u9898\u662f\u66f4\u597d\u7684\u3002<\/p>\n
\u5176\u6b21，\u6790\u6784\u51fd\u6570\u4e2d\u5982\u679c\u629b\u51fa\u5f02\u5e38\u4e5f\u8981\u8c28\u614e\u5904\u7406\u3002\u6bd4\u5982\u6790\u6784\u51fd\u6570\u8981\u91ca\u653e 10 \u4e2a\u8d44\u6e90，\u91ca\u653e\u5230\u7b2c 5 \u4e2a\u65f6\u629b\u51fa\u5f02\u5e38，\u5219\u4e5f\u9700\u8981\u6355\u83b7\u5904\u7406，\u5426\u5219\u540e\u9762\u7684 5 \u4e2a\u8d44\u6e90\u5c31\u6ca1\u91ca\u653e，\u4e5f\u8d44\u6e90\u6cc4\u6f0f\u4e86\u3002\u300aEffective C++\u300b\u7b2c 8 \u4e2a\u6761\u6b3e\u4e5f\u4e13\u95e8\u8bb2\u4e86\u8fd9\u4e2a\u95ee\u9898：\u522b\u8ba9\u5f02\u5e38\u9003\u79bb\u6790\u6784\u51fd\u6570\u3002<\/p>\n
#include <iostream>
\nusing namespace std;<\/p>\n
double Divide(int a, int b)
\n{
\n \/\/ \u5f53 b == 0 \u65f6\u629b\u51fa\u5f02\u5e38
\n if (b == 0)
\n {
\n throw "Division by zero condition!";
\n }
\n return (double)a \/ (double)b;
\n}<\/p>\n
void Func()
\n{
\n \/\/ \u8fd9\u91cc\u53ef\u4ee5\u770b\u5230\u5982\u679c\u53d1\u751f\u9664 0 \u9519\u8bef\u629b\u51fa\u5f02\u5e38，\u4e0b\u9762\u7684 array \u6ca1\u6709\u5f97\u5230\u91ca\u653e\u3002
\n \/\/ \u6240\u4ee5\u8fd9\u91cc\u6355\u83b7\u5f02\u5e38\u540e\u5e76\u4e0d\u5904\u7406\u5f02\u5e38，\u5f02\u5e38\u8fd8\u662f\u4ea4\u7ed9\u5916\u5c42\u5904\u7406，\u8fd9\u91cc\u6355\u83b7\u4e86\u518d\u91cd\u65b0\u629b\u51fa\u53bb\u3002
\n int* array = new int[10];
\n try
\n {
\n int len, time;
\n cin >> len >> time;
\n cout << Divide(len, time) << endl;
\n }
\n catch (…)
\n {
\n \/\/ \u6355\u83b7\u5f02\u5e38\u91ca\u653e\u5185\u5b58
\n cout << "delete []" << array << endl;
\n delete[] array;
\n throw; \/\/ \u5f02\u5e38\u91cd\u65b0\u629b\u51fa，\u6355\u83b7\u5230\u4ec0\u4e48\u629b\u51fa\u4ec0\u4e48
\n }
\n cout << "delete []" << array << endl;
\n delete[] array;
\n}<\/p>\n
int main()
\n{
\n try
\n {
\n Func();
\n }
\n catch (const char* errmsg)
\n {
\n cout << errmsg << endl;
\n }
\n catch (const exception& e)
\n {
\n cout << e.what() << endl;
\n }
\n catch (…)
\n {
\n cout << "Unkown Exception" << endl;
\n }
\n return 0;
\n} <\/p>\n
\u5bf9\u4e8e\u7528\u6237\u548c\u7f16\u8bd1\u5668\u800c\u8a00，\u9884\u5148\u77e5\u9053\u67d0\u4e2a\u7a0b\u5e8f\u4f1a\u4e0d\u4f1a\u629b\u51fa\u5f02\u5e38\u5927\u6709\u88e8\u76ca，\u77e5\u9053\u67d0\u4e2a\u51fd\u6570\u662f\u5426\u4f1a\u629b\u51fa\u5f02\u5e38\u6709\u52a9\u4e8e\u7b80\u5316\u8c03\u7528\u51fd\u6570\u7684\u4ee3\u7801\u3002<\/p>\n
#include <iostream>
\n#include <new>
\nusing namespace std;<\/p>\n
\/\/ C++98
\n\/\/ \u8fd9\u91cc\u8868\u793a\u8fd9\u4e2a\u51fd\u6570\u53ea\u4f1a\u629b\u51fa bad_alloc \u7684\u5f02\u5e38
\nvoid* operator new (std::size_t size) throw (std::bad_alloc);
\n\/\/ \u8fd9\u91cc\u8868\u793a\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4f1a\u629b\u51fa\u5f02\u5e38
\nvoid* operator delete (std::size_t size, void* ptr) throw();<\/p>\n
\/\/ C++11
\nsize_type size() const noexcept;
\niterator begin() noexcept;
\nconst_iterator begin() const noexcept;<\/p>\n
double Divide(int a, int b) noexcept
\n{
\n \/\/ \u5f53 b == 0 \u65f6\u629b\u51fa\u5f02\u5e38
\n if (b == 0)
\n {
\n throw "Division by zero condition!";
\n }
\n return (double)a \/ (double)b;
\n}<\/p>\n
int main()
\n{
\n try
\n {
\n int len, time;
\n cin >> len >> time;
\n cout << Divide(len, time) << endl;
\n }
\n catch (const char* errmsg)
\n {
\n cout << errmsg << endl;
\n }
\n catch (…)
\n {
\n cout << "Unkown Exception" << endl;
\n }<\/p>\n
int i = 0;
\n cout << noexcept(Divide(1, 2)) << endl;
\n cout << noexcept(Divide(1, 0)) << endl;
\n cout << noexcept(++i) << endl;
\n return 0;
\n} <\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f，noexcept \u8fd0\u7b97\u7b26\u5224\u65ad\u7684\u662f\u8868\u8fbe\u5f0f\u672c\u8eab\u662f\u5426\u58f0\u660e\u53ef\u80fd\u629b\u51fa\u5f02\u5e38，\u800c\u4e0d\u662f\u8fd0\u884c\u65f6\u662f\u5426\u771f\u7684\u629b\u51fa\u5f02\u5e38，\u56e0\u6b64 noexcept(Divide(1, 0)) \u7684\u7ed3\u679c\u540c\u6837\u4e3a true\u3002<\/p>\n
C++ \u6807\u51c6\u5e93\u4e5f\u5b9a\u4e49\u4e86\u4e00\u5957\u81ea\u5df1\u7684\u5f02\u5e38\u7ee7\u627f\u4f53\u7cfb，\u57fa\u7c7b\u662f exception\u3002\u6240\u4ee5\u65e5\u5e38\u5199\u7a0b\u5e8f，\u9700\u8981\u5728\u4e3b\u51fd\u6570\u6355\u83b7 exception \u5373\u53ef；\u8981\u83b7\u53d6\u5f02\u5e38\u4fe1\u606f，\u8c03\u7528 what \u51fd\u6570，what \u662f\u4e00\u4e2a\u865a\u51fd\u6570，\u6d3e\u751f\u7c7b\u53ef\u4ee5\u91cd\u5199\u3002<\/p>\n
\u6807\u51c6\u5e93\u5f02\u5e38\u4f53\u7cfb\u53ef\u53c2\u8003\u5b98\u65b9\u6587\u6863：exception – C++ Reference<\/p>\n
| std::exception<\/td>\n | \u6240\u6709\u6807\u51c6\u5f02\u5e38\u7684\u57fa\u7c7b，\u63d0\u4f9b\u865a\u51fd\u6570 what()<\/td>\n<\/tr>\n |
| std::bad_alloc<\/td>\n | new \u7533\u8bf7\u5185\u5b58\u5931\u8d25\u65f6\u629b\u51fa<\/td>\n<\/tr>\n |
| std::bad_cast<\/td>\n | \u52a8\u6001\u7c7b\u578b\u8f6c\u6362 dynamic_cast \u5931\u8d25\u65f6\u629b\u51fa<\/td>\n<\/tr>\n |
| std::out_of_range<\/td>\n | \u8bbf\u95ee\u8d8a\u754c，\u5982 vector::at \u4e0b\u6807\u975e\u6cd5<\/td>\n<\/tr>\n |
| std::logic_error<\/td>\n | \u903b\u8f91\u9519\u8bef\u7c7b\u5f02\u5e38\u7684\u57fa\u7c7b<\/td>\n<\/tr>\n |
| std::runtime_error<\/td>\n | \u8fd0\u884c\u65f6\u9519\u8bef\u7c7b\u5f02\u5e38\u7684\u57fa\u7c7b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n9. \u5c0f\u7ed3<\/h3>\n\u6458\u8981：\u672c\u6587\u7cfb\u7edf\u68b3\u7406 C \u5f02\u5e38\u5904\u7406\u673a\u5236，\u4ece\u5f02\u5e38\u7684\u57fa\u672c\u6982\u5ff5\u4e0e C \u8bed\u8a00\u9519\u8bef\u7801\u7684\u5bf9\u6bd4\u51fa\u53d1，\u4f9d\u6b21\u8bb2\u89e3\u5f02\u5e38\u7684\u629b\u51fa\u4e0e\u6355\u83b7\u3001\u6808\u5c55\u5f00\u3001\u5339\u914d\u89c4\u5219\u3001\u5f02\u5e38\u91cd\u65b0\u629b\u51fa\u3001\u5f02\u5e38\u5b89\u5168\u95ee\u9898\u4ee5\u53ca\u5f02\u5e38\u89c4\u8303，\u5e76\u7ed3\u5408\u6807\u51c6\u5e93\u5f02\u5e38\u4f53\u7cfb\u7ed9\u51fa\u5b8c\u6574\u53ef\u8fd0\u884c\u7684\u4ee3\u7801\u793a\u4f8b，\u5e2e\u52a9\u8bfb\u8005\u5efa\u7acb\u5bf9 C \u5f02\u5e38\u5904\u7406\u7684\u6574\u4f53\u8ba4\u77e5\u3002 |