how to destruct list with loop? - Programming版

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Programming版 - how to destruct list with loop?

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相关话题的讨论汇总
话题: node话题: sll话题: next话题: null话题: todel

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s*w
发帖数: 729

#include
using namespace std;
struct node {
int val;
node* next;
node(int v):val(v),next(NULL) {}
};
struct sll {
node* head;
sll():head(NULL) {}
~sll() {
cout << "sll destructing starts here" << endl;
node* p = head;
while(p) { // i am having problems destrucing here with looped list
node* todel = p;
p = p->next;
delete todel; // i thought delete make todel NULL so it breaks loop
todel = NULL; // does this help? nonono
cout << "destructing " << p << endl;
}
cout << "sll destructed" << endl;
}

void insert(int v) {
node* p = new node(v);
p->next = head;
head = p;
}
};
int main() {
// make a loop list
sll lst;
lst.insert(5);
lst.insert(4);
lst.insert(3);
lst.insert(2);
lst.insert(1);
node *p5 = lst.head;
while(p5->next)
p5 = p5->next;
node *p3 = lst.head->next->next;
p5->next = p3;
}

(共1页)

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相关话题的讨论汇总
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