程式碼片

#include<stdio.h>
#include<stdlib.h>

#define MaxSize 5
typedef struct node* SeQuence;

struct node {
    char data[MaxSize];
    int Front, Rear; //Front隊頭，出隊用，Rear隊尾，入隊用
};

//初始化
void InitQuence(SeQuence *L) {
    (*L) = (SeQuence)malloc(sizeof(struct node));
    (*L)->Front = 0;
    (*L)->Rear = 0
 
;
}

//入隊
void AadQuence(SeQuence L, char x) {

    if ((L->Rear + 1) % MaxSize == L->Front) { //Front和Rear相遇佇列滿
        printf("滿佇列");
    }
    else {
        L->Rear = (L->Rear + 1) % MaxSize;  //隊尾加一
        L->data[L->Rear] = x;
    }
}

//出隊
void DeQuence(SeQuence L, char *x) {
    if
 
 (L->Front ==L->Rear) { //相等說明空佇列
        printf("空佇列");
    }
    else {
        L->Front = (L->Front + 1) % MaxSize; //隊頭加一
        *x = L->data[L->Front];
    }
}

void PrintQuence(SeQuence L) {
    int i;

    i = (L->Front + 1) % MaxSize; //隊頭加一開始遍歷
    while (i != L->Rear) {
        printf
 
("%c", L->data[i]);
        i = (i + 1) % MaxSize;
    }
    printf("%c", L->data[i]); //隊尾
    printf("\n");
}

int main() {
    SeQuence q;
    char* y;
    char x;

    y = &x;
    InitQuence(&q);
    printf("輸入資料:\n");
    scanf("%c", &x);
    while (x != '\n') {
        AadQuence(q, x);
        scanf("%c", &x);
    }
    PrintQuence(q);
    DeQuence(q, y);
    printf("出隊資料是:%c\n",*y);
    printf("剩餘:\n");
    PrintQuence(q);
}