main.c

银行atm机模拟程序 实现简单的atm机操作 单机版的

					if(strcmp((*user).pwd,rePwd) != 0){
						printf("The confirmed password is not the same with the password.\n");//两次输入密码不一致
						
					}else {	//else4
						free(rePwd);//已不再使用rePwd，释放rePwd 所占的内存
						
						strcpy((*user).total,"100");
						if(writeUser(user) == -1) {	//为用户创建一文件用来保存用户信息
							printf("error in function registNewUser()...\n");
							return -1;
						}
						printf("Register success\n");
						return 1;	//注册成功,返回登录界面，用户选择继续操作还是退出
						
					}//end else4
					
				}//end else3
				
			}//end else2
			
		}//end else1
	}//end while
	return 0;
}

int file_exist(char* filename)	
{
	return (access(filename,0) == 0);
}
void registInfo(void)
{
	
	printf("1、Go on。\n");
	printf("2、exit。\n");
}

int writeUser(struct userInfo* user)//创建一文件用来保存用户的注册信息，文件名为用户名
{
	int fi;
	int len = 0;
	int i;
	strcpy((*user).userData,(*user).name);
	strcat((*user).userData,"  ");
	strcat((*user).userData,(*user).pwd);
	strcat((*user).userData,"  ");
	strcat((*user).userData,(*user).total);
	
	len = strlen((*user).userData);
	for(i = 0;i < 39-len;i++){
		strcat((*user).userData," ");
	}
	strcat((*user).userData,"\n");
	
	
	fi = open((*user).name, O_WRONLY | O_CREAT | O_TRUNC,
                         S_IREAD | S_IWRITE);
	if(fi == -1) {
		printf("File open error in write user register information to file\n");
		return -1;
	}
	write(fi,(*user).userData,sizeof(char)*40);
	close(fi);
	return 0;
}

int deposit(struct userInfo* user,struct operation* op)
{
	int valueofMoney = 0;
	int valueofTotal = 0;
	
	(*op).type = "1";
	//(*op).prev = (*user).total;
	printf("How much:");
	getMoney((*op).amount);
	
	strcpy((*op).prev,(*user).total);//执行操作前的用户余额
	
	stringToInteger((*user).total,&valueofTotal);
	stringToInteger((*op).amount,&valueofMoney);
	
	/*if((valueofTotal+valueofMoney) > 9999999999){
		printf("Too much money ...\n");
		return 0;
	}*/
	integerToString(valueofTotal+valueofMoney,(*user).total);
	
	//(*op).post = (*user).total;
	strcpy((*op).post,(*user).total);//执行操作后的用户余额
	getCurTime((*op).time);//获取系统当前时间
	
	if(writeLog(user,op) == 0){	//存钱记录成功写入日志，操作成功
		printf("deposit success.\n");
		return 0;
	}
	
	printf("error in deposit...\n");
	return -1;//存钱操作失败
	
}
int getMoney(char* money)
{    
     int i, test;
     while(1){
		 scanf("%s",money);
		 test = 0;
		 for(i = 1;i < strlen(money);i ++){
		 	
		    if((money[i]<'0')||(money[i]>'9')){
		    	if(i ==0 && money[i] == '0') test = 1;
				test = 1;
				//free(num);
				break;
		        }              
		 }
		 if(test == 0)	break;
     }//end while
     return 0;
}

int stringToInteger(char* str,int *value)
{	
	int len = 0;
	int i;
	len = strlen(str);
	if(len == 0){
		printf("no string in function stringToInteger");
		return -1;
	}else{
		for(i = 0;i < len;i++){
			*value *= 10;
			*value += (str[i]-'0');
		}
	}
	return 0;
}
int integerToString(int value,char* str)
{
	
	sprintf(str,"%d",value);
	return 0;
}
int getCurTime(char* operTime)
{
	int len,i;
	time_t t;
   	time(&t);
   	sprintf(operTime,"%s",ctime(&t));
   	//删除系统时间最后面的'\n'
	len = strlen(operTime);
	for(i = 0;i < len;i++){
		if(operTime[i] == '\n'){
			operTime[i] = '\0';
			break;
		}
	}
   	return 0;
}
inline int writeLog(struct userInfo* user,struct operation* op)
{

	int len,i;
	
	FILE* f;
	////////////////////////////////////////////////////////////////////////////////////
	strcpy((*user).userData,(*user).name);											
	strcat((*user).userData,"  ");													
	strcat((*user).userData,(*user).pwd);											
	strcat((*user).userData,"  ");													//
	strcat((*user).userData,(*user).total);											//生成更新后的用户信息
	len = strlen((*user).userData);													//
	for(i = 0;i < 39-len;i++){														
		strcat((*user).userData," ");
	}
	strcat((*user).userData,"\n");
	///////////////////////////////////////////////////////////////////////////////////////
	strcpy((*op).operData,(*op).type);
	strcat((*op).operData,"  ");
	strcat((*op).operData,(*op).time);
	strcat((*op).operData,"  ");
	strcat((*op).operData,(*op).amount);
	strcat((*op).operData,"  ");
	strcat((*op).operData,(*op).prev);
	strcat((*op).operData,"  ");													//生成操作信息
	strcat((*op).operData,(*op).post);
	strcat((*op).operData,"  ");
	if((*op).type == "3"||(*op).type == "4")strcat((*op).operData,(*op).userName);
	len = strlen((*op).operData);
	for(i = 0;i < 59-len;i++){
		strcat((*op).operData," ");
	}
	strcat((*op).operData,"\n");
	////////////////////////////////////////////////////////////////////////////////////////
	f=fopen((*user).name,"r+");
	if(f == NULL){
		printf("fail to open file in function writeLog()...\n");
		return -1;
	}
	fseek(f,0,SEEK_SET);
	fputs((*user).userData,f);
	fseek(f,0,SEEK_END);
	fputs((*op).operData,f);
	fclose(f);
	return 0;
}
int drawMoney(struct userInfo* user,struct operation* op)
{
	int valueofMoney = 0;
	int valueofTotal = 0;
	
	(*op).type = "2";
	(*op).prev = (*user).total;//执行操作前的用户余额
	
	printf("How much:");
	getMoney((*op).amount);
	
	stringToInteger((*user).total,&valueofTotal);
	stringToInteger((*op).amount,&valueofMoney);
	if(valueofTotal < valueofMoney){
		printf("There is not enough money in your account...\n");
		return 0;
	}
	
	integerToString(valueofTotal-valueofMoney,(*user).total);
	(*op).post = (*user).total;//执行操作后的用户余额
	
	getCurTime((*op).time);//获取系统当前时间
	
	if(writeLog(user,op) == 0){//取钱记录成功写入日志，操作成功
		printf("drawMoney success.\n");
		return 0;
	}
	printf("error in deposit...\n");
	return -1;//取钱操作失败
}

//实现用户转帐功能，在转出用户和转入用户的日志中都要记录
int transfer(struct userInfo* user,struct operation* op)
{
	int valueofMoney = 0;
	int valueofTotal = 0;
	char* toUser = malloc(sizeof(char)*MAXINFO);
	
	(*op).type = "3";
	//(*op).prev = (*user).total;//执行操作前的用户余额
	strcpy((*op).prev,(*user).total);//执行操作前的用户余额
	while(1){
		printf("User name(0 to cancle):");
		scanf("%s",(*op).userName);
		if(strcmp((*op).userName,"0") == 0){
			printf("Canceled...\n");
			return 0;
		}
		if(file_exist((*op).userName)) break;
		printf("User name does not exist.Retry...\n");
	}
	strcpy(toUser,(*op).userName);
	
	printf("How much:");
	getMoney((*op).amount);
	
	stringToInteger((*user).total,&valueofTotal);
	stringToInteger((*op).amount,&valueofMoney);
	if(valueofTotal < valueofMoney){
		printf("There is not enough money in your account...\n");
		return 0;
	}
	
	integerToString(valueofTotal-valueofMoney,(*user).total);
	
	//(*op).post = (*user).total;				？？？当直接用等于号给prev 和post 赋值时，两者最终结果相同，都是操作后的用户余额，指针赋值指向同一内存空间
	
	strcpy((*op).post,(*user).total);//执行操作前的用户余额
	getCurTime((*op).time);//获取系统当前时间
	
	if(writeLog(user,op) == 0){	//begin if
		strcpy((*op).userName,(*user).name); 
		if(getUserinfo(toUser,user) == -1){
			printf("Can not read information of the user who you want to transfer your money to,transfer canceled\n");
			//执行回滚操作
			return -1;	//转帐操作失败
		
		}else{	//begin else	成功读取要转入的用户信息，进行存钱操作
			valueofMoney = 0;
			valueofTotal = 0;
			(*op).type = "4";
			
			stringToInteger((*user).total,&valueofTotal);
			integerToString(valueofTotal,(*op).prev);
			stringToInteger((*op).amount,&valueofMoney);
			
			integerToString(valueofTotal+valueofMoney,(*user).total);//转出金额与转入金额相同
			
			strcpy((*op).post,(*user).total);//执行操作后的用户余额
			
			if(writeLog(user,op) == 0){
				free(toUser);
				if(getUserinfo((*op).userName,user) == -1)return -1;//日志写入转入用户日志文件时失败。
				
				return 0;//日志成功写入转入用户日志文件中，转帐操作成功。
			} 
			
			printf("deposit money erroe in transfer,Canceled...\n");
			//执行回滚操作
			return -1;
		}//end else*/
	}//end if
	
	//向转出用户写入日志时失败，转帐操作失败，取消。
	printf("draw money error in transfer,Canceled...\n");
	return -1;
	
}
/*int isNumAlpha(char ch)
{
	return ((ch>='0')&&(ch<='9'));
}*/