29 lines
491 B
Dart
29 lines
491 B
Dart
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void main(){
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// 创建一个 2->4->3 的链表对象
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ListNode listNode = ListNode(2,next: ListNode(4,next: ListNode(3)));
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// 并完成 ListNode#toString 方法，打印 243
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print(listNode);
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}
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class ListNode {
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int val;
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ListNode? next;
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ListNode(this.val, {this.next});
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@override
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String toString(){
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ListNode? cur = this;
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String result = "";
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while( cur!=null){
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result = result +cur.val.toString();
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cur = cur.next;
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}
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return result;
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}
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} |