Question

1.编写顺序存储队列基本操作函数：①队列初始化②入队操作③出队操作④输出队头元素⑤判断队列是否为空

Answer 1

(VC6下明敬编译通过)
#include <stdio.h>

main()
{
int a[1000],top,tail;
int i,n=1;
do
{
switch (n)
{
case 1:top=tail=0;break;
case 2:printf("输入要插入的元素：");scanf("%d",&a[++top]);break;
case 3:if (tail<top) tail++;break;
case 4:printf("\n\n\n\n\n\n\n\册判n\n\n\n\n\n\n\n\n\n\n\n\n队头为： %d\n",a[top]);break;
case 5:printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");if (tail==top) printf("空队列\n"); else printf("非空队列.\n");
}
if (n!=5&&n!=4)
printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
printf("队列现在状态：");
for (i=tail+1;i<=top;i++)
printf(" %d",a[i]);
if (tail==top)
printf("空队列");
printf("\n");
printf("\n1队列初始化\n2入队操作\n3出队操作\n4输出队头元素\n5判断队列是否为空\n0退出\n请输入代州槐改码：");
scanf("%d",&n);

} while (n!=0);
}