c语言代码队列

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<stdlib.h>

struct queue {

int head;

int tail;

int q[100];

}d;

int main(void)

{

    d.head=1;

    d.tail=1;

int count = 0;

int a[100], b[100];

int i, n;

scanf("%d", &n);

for (i = 1; i <= n; i++)

{

scanf("%d", &a[i]);

if (a[i] == 1)

{

scanf("%d", &b[i]);

d.q[d.tail] = b[i];

d.tail++;

count++;

}

else if (a[i] == 2)

{

if (count == 0)

{ printf("no\n");

    exit(0);

}

else

{

printf("%d\n", d.q[d.head]);

d.head++;

count--;

}

}

else

printf("%d\n", count);

}

return 0;

}