p185.cpp

《C++编程指南（续编）》的一些程序源代码

#include <iostream>
#include <string>

using namespace std;

class Student
{
public:
	Student(char * pLN,char * pFN,
		int nGrd,unsigned long ulId);
	~Student();

protected:
	std::string sLName;
	std::string sFName;
	int nGrade;
	unsigned long ulID;
};
Student::Student(char * pLN,char * pFN, int nGrd,unsigned long ulId):sLName(pLN),sFName(pFN)
{
	cout<<"Constructing"<<(sFName+" "+sLName)<<endl;
	nGrade=nGrd;
	ulID=ulId;
}
Student::~Student()
{
	cout<<"Destructing"<<(sFName+" "+sFName)<<endl;
}
int someError()
{
	return 1;
}
void fn2()
{
	cout<<"Entering fn2"<<endl;
	Student s2("Rabbit","Butthead",-2,876543210L);

	int nErrRtn;
	if(nErrRtn=someError())
	{
		cout<<"Throwing error"<<nErrRtn<<endl;
		throw nErrRtn;
	}
	cout<<"Continuing on in f2()"<<endl;
}
void fn1()
{
	cout<<"Entering fn1"<<endl;
	Student s1("Rabbit","Beavis",1,765432109L);
	cout<<"Calling fn2 from fn1"<<endl;
	fn2();
	cout<<"Continuing on in fn1"<<endl;
}
int main(int,char **)
{
	try
	{
		cout<<"Calling fn1 from main"<<endl;
		fn1();
		cout<<"Continuing on in main"<<endl;
	}
	catch (int nErrRtn)
	{
		cout<<"Fielded error"<<nErrRtn<<endl;
	}
	return 0;
}