ATM的功能的模拟： 开户 销户 查询余额 查询最后5笔明细 存款 取款 转帐 退出

 

#include 
#include 
#include 
#define LEN sizeof(struct Account)
#define RECORDCOUNT 5
#define MESSAGELENGTH 100
#define NAMELENGTH 100
#define VIEWCOUNT 5
#define DEFAULTBALANCE 0.00
#define SAVE 1
struct Account  *head,*tail,*p; /*账户头部和尾部指针*/
struct Account
{
    char	name[NAMELENGTH];			    /* 账户名称 */
    float	balance;		    /* 账户余额*/
    char	message[RECORDCOUNT][MESSAGELENGTH];    /* 交易记录 */
    int maxMessageIndex;
    struct Account  *next;	/* 指向下一账户 */
};

void freeMemory();   /*释放内存*/
void removeFirst(struct Account * account);    /*移除第一个元素*/
void showMenu();                /*输出选择菜单*/
struct Account * findAccountByName(char name[]);       /*通过账户名称找到对应的账户 */
void writeMessage(struct Account * account,char message[]);  /* 写入交易记录 */
void  init();	/* 创建链表，并返回表头指针 */
void openAccount();         /* 开户 */
void closeAccount();        /* 销户 */
void deposit();              /* 存款*/
void withdraw();            /* 取款 */
void transfer();             /* 转账 */
void print();              /*输出账户列表*/
void printMessage();      /*输出账户交易记录*/

int main()
{
    init();
    printf("欢迎使用ATM管理系统\n");
    showMenu();
    char choice;
    fflush(stdin);
    choice = getchar();
    while(choice != '8')
    {
        switch(choice)
        {
        case '1':
            openAccount();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '2':
            closeAccount();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '3':
            deposit();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '4':
            withdraw();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '5':
            transfer();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '6':
            print();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        case '7':
            printMessage();
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        default:
            printf("无效菜单!\n");
            showMenu();
            fflush(stdin);
            choice = getchar();
            break;
        }
    }
    freeMemory();   /*释放内存*/
    return 0;
}

void showMenu()
{
    printf("请选择 1.开户 2.销户 3.存款 4.取款 5.转账 6.查看所有账户 7. 最近五笔交易 8.退出\n");
}

//通过账户名称找到对应的账户
struct Account *  findAccountByName(char name[])
{
    if(strlen(name)>0)
    {
        p = head;
        while(p != NULL)
        {
            if(strcmp(p->name,name)==0)
            {
                return p;
            }
            p = p->next;
        }
    }
    return NULL;
}

//写入交易记录
void writeMessage(struct Account * account,char message[])
{
    if(account->maxMessageIndex >= RECORDCOUNT)
    {
        removeFirst(account);
        strcpy((account->message)[RECORDCOUNT-1],message);
        account->maxMessageIndex = account->maxMessageIndex+1;
    }
    else
    {
        strcpy((account->message)[account->maxMessageIndex],message);
        account->maxMessageIndex = account->maxMessageIndex+1;
    }
}

void removeFirst(struct Account * account)
{
    int i=0;
    for(i=1; imessage)[i-1],(account->message)[i]);
}

/* 初始化三个默认账户 */
void init()
{
    p = (struct Account *)malloc(LEN);		/* 创建第一个账户 */
    p->balance=DEFAULTBALANCE;
    p->next=NULL;
    p->maxMessageIndex=0;
    strcpy(p->name,"001");
    head=p;
    tail = p;


    p = (struct Account *)malloc(LEN);	/* 创建第二个账户 */
    p->balance=DEFAULTBALANCE;
    p->next=NULL;
    p->maxMessageIndex=0;
    strcpy(p->name,"002");
    head->next = p;
    tail = p;

    p = (struct Account *)malloc(LEN);	/* 创建第三个账户 */
    p->balance=DEFAULTBALANCE;
    p->next=NULL;
    p->maxMessageIndex=0;
    strcpy(p->name,"003");
    tail->next = p;
    tail = p;
}

//输出账户列表信息
void print()
{
    int		i;
    p = head;
    i = 1;
    while(p != NULL)
    {
        printf("第%d个账户的数据 账户名称：%s     余额：%.2f\n",i++,p->name,p->balance);
        p = p->next;
    }
}
//释放内存
void freeMemory()
{
    p = head;
    while(p != NULL)
    {
        head = p;
        free(head);
        p = p->next;
    }
}

//开户
void openAccount()
{
    char name[NAMELENGTH];
    printf("请输入新开立的账户名称  : ");
    fflush(stdin);
    gets(name);
    if(strlen(name)>0)
    {
        p = (struct Account *)malloc(LEN);		/* 创建一个新账户 */
        p->balance=DEFAULTBALANCE;
        p->next=NULL;
        strcpy(p->name,name);
        tail->next=p;
        tail = p;
    }
}
//销户
void closeAccount()
{
    char name[NAMELENGTH];
    printf("请输入要销户的账户名称 : ");
    fflush(stdin);
    gets(name);
    if(strlen(name)>0)
    {
        struct Account  *pre;
        p = head;
        pre=head;
        int find=0;
        while(p != NULL)
        {
            if(strcmp(p->name,name)==0)
            {
                if(head == p)
                    head=p->next;
                else if(tail==p)
                {
                    pre->next=NULL;
                    tail = pre;
                }
                else
                {
                    pre->next = p->next;
                }
                find=1;
                break;
            }
            pre = p;
            p = p->next;
        }
        if(find==0)
            printf("没有此账户，无法完成销户!\n");
    }
}

//存款
void deposit()
{
    char name[NAMELENGTH];
    printf("请输入要存款的账户名称 :");
    fflush(stdin);
    gets(name);
    p = findAccountByName(name);
    if(p!=NULL)
    {
        float savemoney;
        printf("请输入要存款的金额 : ");
        scanf("%f",&savemoney);
        while(savemoney<=0)
        {
            printf("存款额不能小于等于零，请重新输入! ");
            scanf("%f",&savemoney);
        }
        p->balance = p->balance+savemoney;              /*存入账户金额*/
        char message[MESSAGELENGTH];
        sprintf(message,"账户%s成功存入%.2f元!\n",name,savemoney);
        writeMessage(p,message);                                     /*写入交易记录*/
    }
    else
        printf("没有此账户!\n");
}

//取款
void withdraw()
{
    char name[NAMELENGTH];
    printf("请输入要取款的账户名称 :");
    fflush(stdin);
    gets(name);
    p = findAccountByName(name);
    if(p!=NULL)
    {
        float savemoney;
        printf("请输入要取款的金额 : ");
        fflush(stdin);
        scanf("%f",&savemoney);
        while(savemoney<=0 || savemoney> p->balance)
        {
            printf("存款额不能小于等于零或者大于余额,请重新输入! ");
            scanf("%f",&savemoney);
        }
        p->balance = p->balance-savemoney;  /*存入账户金额*/
        char message[MESSAGELENGTH];
        sprintf(message,"账户%s成功取出%.2f元!\n",name,savemoney);
        writeMessage(p,message);     /*写入交易记录*/
    }
    else
        printf("没有此账户!\n");
}

//转账
void transfer()
{
    char outname[NAMELENGTH];
    char inname[NAMELENGTH];
    struct Account  *outAccount;
    struct Account  *inAccount;
    printf("请输入要转出的账户名称 :");
    fflush(stdin);
    gets(outname);
    outAccount = findAccountByName(outname);
    if(outAccount!=NULL)
    {

        printf("请输入要转入的账户名称 :");
        fflush(stdin);
        gets(inname);
        inAccount = findAccountByName(inname);
        if(inAccount != NULL)
        {
            float money;
            printf("请输入要转账的金额 : ");
            fflush(stdin);
            scanf("%f",&money);
            while(money<=0 || money> outAccount->balance)
            {
                printf("转账金额不能小于等于零或者大于转出账户余额,请重新输入! ");
                scanf("%f",&money);
            }
            outAccount->balance = outAccount->balance-money; /*减少转出账户金额*/
            inAccount->balance = inAccount->balance+money;   /*增加转入账户金额*/
            char outmessage[MESSAGELENGTH];
            sprintf(outmessage,"账户%s成功转出%.2f元!\n",outname,money);
            writeMessage(outAccount,outmessage);    /*写入转出交易记录*/
            char inmessage[MESSAGELENGTH];
            sprintf(inmessage,"账户%s成功转入%.2f元!\n",inname,money);
            writeMessage(inAccount,inmessage);    /*写入转出交易记录*/
        }
    }
    else
        printf("没有此转出账户!\n");
}

//查看账户最近五笔交易历史
void printMessage()
{
    char name[NAMELENGTH];
    printf("请输入要查看最近五笔交易历史的账户名称 :");
    fflush(stdin);
    gets(name);
    p = findAccountByName(name);
    if(p!=NULL)
    {
        int i=0;
        int end = (p->maxMessageIndex)>=VIEWCOUNT?VIEWCOUNT:(p->maxMessageIndex);
        for(i=0; imessage)[i]);
    }
    else
        printf("没有此账户!\n");
}