PTA基础编程题 7

苏格拉没有底w: 为什么这么写就不对了呀，大家可以看一下嘛 [code=csharp] List Insert( List L, ElementType X, Position P ){ Position current = L->Next,pre=L; PtrToLNode node = (PtrToLNode)malloc(sizeof(struct LNode)); node->Data = X; node->Next = NULL; if(L == P){ node->Next = L; L = node; return L; } while(current){ if(P == current){ node->Next = current; pre->Next = node; return L; } pre = current; current = current->Next; } printf("Wrong Position for Insertion\n"); return ERROR; } [/code]