对列代码运行时出现bug，不会执行入队操作
#include<iostream>#include"stdio.h"
using namespace std;
typedef int DATA;
struct NodeType {
int data;
NodeType* next;
};
class LinkRear {
private:
NodeType* Head;
int len;
public:
LinkRear(); //构造
~LinkRear(); //析构
void input(int x);//入队
void output(); //出队
void print(); //打印队;
int getLen(); //获取队中元素个数
};
LinkRear::LinkRear() { //创建空链表
Head = new NodeType;
Head->next = NULL;
Head->data = 0;
len = 0;
}
LinkRear::~LinkRear() {
NodeType* p = Head->next; //使p指向第一个节点
while (p != NULL) {
Head->next = p->next;
delete p;
p = Head->next;
}
delete Head; //最后将头节点也删除
len = 0;
cout<< "队列被清空!" <<endl;
}
void LinkRear::output() {
NodeType* p = Head->next;//使p指向第一个节点
if (p != NULL) {
Head->next = p->next;//使头节点指向p的下一个节点
cout << p->data << "出队" << endl;
delete p;
}
len--;
}
void LinkRear::input(int x) { //入队
NodeType* p, * q;
q = Head;
while (q->next)q = q->next;
p = new NodeType;
p->data = x;
p->next = NULL;
q->next = p; //插在表尾
len++;
cout << x << "入队" << endl;
}
void LinkRear::print() {
NodeType* p;
p = Head->next;
cout<< "队列中的元素为:"<< endl;
while (p != NULL) {
printf("%5d", p->data);
p = p->next;
}
cout << endl;
}
int LinkRear::getLen() {
return len;
}
void main()
{
LinkRear r1;
int data[] = { 23,45,3,7,6,945 };
//显示菜单
cout << "==============" << endl;
cout << "1:入队" << endl;
cout << "2:出队" << endl;
cout << "3:打印队" << endl;
cout << "其他：退出" << endl;
cout << "==============" << endl;
int i = 1, j, op, size;
while (i == 1) {
cout << "请选择操作代码:";
cin >> op;
switch (op) {
case1:
cout << "************入队操作*******" << endl;
size = sizeof(data) / sizeof(data);
for (j = 0; j < size; j++) {
r1.input(data);
}
break;
case2:
cout << "************出栈操作*******" << endl;
size = r1.getLen();
for (j = 0; j < size; j++) {
r1.output();
}
break;
case3:r1.print();
cout << "队中元素个数" << r1.getLen() << endl;
break;
default:i = 0;
}
}
}
执行入队操作但结果显示队列被清空。 总共就一个错误，是case 1:不是case1:！
你写错了，导致直接执行default后的语句，导致程序结束，r1销毁，调用析构函数，输出队列清空 召唤风云 发表于 2020-10-6 21:26
总共就一个错误，是case 1:不是case1:！
你写错了，导致直接执行default后的语句，导致程序结束，r1销毁， ...
谢谢
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