Question

C++自定义异常类举个例子

如题，，，，，，，，，，，，，，，，要现成的东西，不要跟我说什么代码自己写之类的

Answer 1

您好，废话不多说，上程序：#include <exception>
#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;

class Up {};
class Fit {};
void g();

void f(int i) throw (Up, Fit) {
switch(i) {
case 1: throw Up();
case 2: throw Fit();
}
g();
}

// void g() {} // Version 1
void g() { throw 47; } // Version 2
// (Can throw built-in types)

void my_unexpected() {
cout << "unexpected exception thrown";
exit(1);
}

int main() {
set_unexpected(my_unexpected);
// (ignores return value)
for(int i = 1; i <=3; i++)
try {
f(i);
} catch(Up) {
cout << "Up caught" << endl;
} catch(Fit) {
cout << "Fit caught" << endl;
}
}

Answer 2

废话不多说，上程序:#include <exception>
#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std；

class Up {}；
class Fit {}；
void g()；

void f(int i) throw (Up， Fit) {
switch(i) {
case 1: throw Up()；
case 2: throw Fit()；
}
g()；
}

// void g() {} // Version 1
void g() { throw 47； } // Version 2
// (Can throw built-in types)

void my_unexpected() {
cout << "unexpected exception thrown"；
exit(1)；
}

int main() {
set_unexpected(my_unexpected)；
// (ignores return value)
for(int i = 1； i <=3； i++)
try {
f(i)；
} catch(Up) {
cout << "Up caught" << endl；
} catch(Fit) {
cout << "Fit caught" << endl；。

Answer 3

#include <iostream>using namespace std;void main(){ int a=10; try{ for( a=10;a>0;a--) { if(a<3) throw exception("蛋疼"); cout<<a<<endl; } } catch (exception &e){cout<<e.what()<<endl;}
system("pause");}