#include
#include
#define OK 1
#define ERROR 0
typedef int Status; // Status是函数的类型,其值是函数结果状态代码,如OK等
typedef int QElemType;
#define MAXQSIZE 100 // 最大队列长度(对于循环队列,最大队列长度要减1)
typedef struct
{
QElemType *base; // 初始化的动态分配存储空间
int front; // 头指针,若队列不空,指向队列头元素
int rear; // 尾指针,若队列不空,指向队列尾元素的下一个位置
} SqQueue;
//创建队列
Status InitQueue(SqQueue &Q)
{
// 构造一个空队列Q,该队列预定义大小为MAXQSIZE
Q.base=(QElemType *)malloc(sizeof(SqQueue)*MAXQSIZE);
if(Q.base==NULL)return ERROR;
Q.front=Q.rear=0;
return OK;
}
//入队
Status EnQueue(SqQueue &Q,QElemType e)
{
// 插入元素e为Q的新的队尾元素
if((Q.rear+1)%MAXQSIZE==Q.front) return ERROR; //队满则不插入
Q.base[Q.rear]=e;
Q.rear=(Q.rear+1)%MAXQSIZE;
return OK;
}
//出队
Status DeQueue(SqQueue &Q, QElemType &e)
{
// 若队列不空, 则删除Q的队头元素, 用e返回其值, 并返回OK; 否则返回ERROR
if(Q.front==Q.rear)return ERROR;
e=Q.base[Q.front];
Q.front=(Q.front+1)%MAXQSIZE;
return OK;
}
//取对头元素
Status GetHead(SqQueue Q, QElemType &e)
{
// 若队列不空,则用e返回队头元素,并返回OK,否则返回ERROR
if(Q.front==Q.rear)return OK;
e=Q.base[Q.front];
return OK;
}
//计算队列的元素个数
int QueueLength(SqQueue Q)
{
return (Q.rear-Q.front+MAXQSIZE)%MAXQSIZE;
}
//判断队列是否为空
Status QueueTraverse(SqQueue Q)
{
// 若队列不空,则从队头到队尾依次输出各个队列元素,并返回OK;否则返回ERROR.
int i;
i=Q.front;
if(i==Q.rear)printf("The Queue is Empty!"); //请填空
else
{
printf("The Queue is: ");
while(i!=Q.rear) //请填空
{
printf("%d ",Q.base[i]); //请填空
i = (i+1)%MAXQSIZE; //请填空
}
}
printf("
");
return OK;
}
//主函数
int main()
{
int a;
SqQueue S;
QElemType x, e;
if(InitQueue(S)) // 判断顺序表是否创建成功,请填空
{
printf("A Queue Has Created.
");
}
while(1)
{
printf("1:Enter
2:Delete
3:Get the Front
4:Return the Length of the Queue
5:Load the Queue
0:Exit
Please choose:
");
scanf("%d",&a);
switch(a)
{
case 1:
scanf("%d", &x);
if(!EnQueue(S,x)) printf("Enter Error!
"); // 判断入队是否合法,请填空
else printf("The Element %d is Successfully Entered!
", x);
break;
case 2:
if(!DeQueue(S,e)) printf("Delete Error!
"); // 判断出队是否合法,请填空
else printf("The Element %d is Successfully Deleted!
", e);
break;
case 3:
if(!GetHead(S,e))printf("Get Head Error!
"); // 判断Get Head是否合法,请填空
else printf("The Head of the Queue is %d!
", e);
break;
case 4:
printf("The Length of the Queue is %d!
",QueueLength(S)); //请填空
break;
case 5:
QueueTraverse(S); //请填空
break;
case 0:
return 1;
}
}
}