c语言模拟简单atm

初学者，老师的作业，不用太长，简单几个功能就行，取款，查询余额，修改密码，

答案：
#include <stdio.h>
#include <string.h>
#include <conio.h>
struct guke 
{ 
 int  zhanghao;//账号 
 char xingming[10];//姓名 
 char mima[10];//密码 
 float zongjine;//总金额 
}; 
typedef struct guke GUKE; 

typedef struct _node
{
 GUKE   AccountInf;
 _node*   pNext;
}AccountNode;

int number=1;
AccountNode* pHead = NULL;
void GetPassword(char* pPassword);
AccountNode* NewAccount()
{
 AccountNode* pNode = new AccountNode;
 if (pNode == NULL)
  return NULL;
 
 memset(pNode,0,sizeof(AccountNode));
 //input name
 printf("请输入帐号名称:");
 scanf("%s",pNode->AccountInf.xingming);

 //input password
 printf("请输入帐号密码:");
 GetPassword(pNode->AccountInf.mima);
 
 //set default value
 pNode->AccountInf.zhanghao = number++;
 pNode->AccountInf.zongjine = 0;
 return pNode;
}

void InsertAccount(AccountNode* pNode)
{
 if (pNode == NULL)
  return;

 //first node
 if(pHead == NULL)
  pHead = pNode;
 else
 {
  AccountNode* pTmp = pHead;
  while(pTmp->pNext)
  {
   pTmp = pTmp->pNext;
  }
  pTmp->pNext = pNode;
 }
}

bool OpenAccount()
{
 AccountNode* pAccount = NewAccount();
 if (pAccount == NULL)
  return false;
 
 InsertAccount(pAccount);
 printf("开户成功！你的帐号是%d\n",pAccount->AccountInf.zhanghao);
 return true;
}

void ShowAllAccount()
{
 if (pHead == NULL)
  return;
 
 AccountNode* pCurAccount = pHead;
 while(pCurAccount)
 {
  printf("账号:%-4d ",pCurAccount->AccountInf.zhanghao);
  printf("姓名:%-10s ",pCurAccount->AccountInf.xingming);
  printf("密码:%-10s",pCurAccount->AccountInf.mima);
  printf("余额:%.2f\n",pCurAccount->AccountInf.zongjine);
  pCurAccount = pCurAccount->pNext;
 }
}
网上有,自己去C网站下载吧

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