如何完成引发异常的代码？

Question

我正在尝试为一段C ++代码引发异常，因此它将通过测试。得到以下代码：

YourClass::YourClass()
    :timeIter{timepoints}
{
}

然后提示我：

我们现在可以使用CustomStackException类创建自定义异常。例如，我们可以测试堆栈何时已满或为空：

void StackTest::testPop() {
    cout << "- Testing pop()... " << flush;
    // try empty, capacity 1
    Stack s1(1);
    assert( s1.isEmpty() );
    try {
            s1.peekTop();
            cerr << "\npeekTop() worked on empty stack (size 1)\n";
            exit(1);
    } catch (CustomStackException& se) {
            cout << " 0a " << flush;
    }
    try {
        s1.pop();
        cerr << "\npop() worked on empty stack (size 1)\n";
        exit(1);
    } catch (CustomStackException& se) {
        cout << " 0b " << flush;
    }
...

这是我尝试过的。测试现在完成并给出结果，但是我不确定是否正确执行了此操作，因为我没有在示例代码中包括stackFunction部分。有人可以解释示例代码的各个部分吗？

stackFunction() {
 if ( isFull() ) {
 throw CustomStackException("stackFunction()", "stack is full");
 } else {
 return variable;
 }
 }

...

正确抛出异常后，它将导致测试通过。

当前结果：

void StackTest::testPop() {
    cout << "- Testing pop()... " << flush;
    // try empty, capacity 1
    Stack s1(1);
    assert( s1.isEmpty() );
    try {
            s1.peekTop();
            cerr << "\npeekTop() worked on empty stack (size 1)\n";

            //FIXME: 3. Throwing an exception if s1.isFull
                if( s1.isFull() ){
                    throw CustomStackException("peekTop()", "stack is full");
                }else{
                    return;
                }

            exit(1);
    } catch (CustomStackException& se) {
            cout << " 0a " << flush;
    }
    try {
        s1.pop();
        cerr << "\npop() worked on empty stack (size 1)\n";

            //FIXME: 3. Throwing an exception if s1.isFull
            if( s1.isFull() ){
                throw CustomStackException("pop()", "stack is full");
            }else{
                return;
            }

        exit(1);
    } catch (CustomStackException& se) {
        cout << " 0b " << flush;
    }