#include<stdio.h> #include<string.h> #include<conio.h> #include<stdlib.h>
#define file "temp.txt" //数据存储的文件名 struct user //用户类型定义(账号，姓名，密码，余额)
{ int id; char name[20]; char person_password[7]; double money; }; void add()//添加用户资料 { printf("%30s\n","添加用户"); printf("---------------------------------------------\n\n"); struct user getuser(); int count(); //函数目的：计算文件中的记录数目以生成自动账号 FILE *fp; int number; struct user temp; if((fp=fopen(file,"ab"))==NULL) { printf("cannot open file!\n"); exit(1); } temp=getuser(); //读取用户名 number=count();
temp.id=number+1; //生成自动账号 fwrite(&temp,sizeof(struct user),1,fp); printf("添加用户成功!\n"); fclose(fp); }
int count() //函数目的：计算文件中的记录总数 { FILE *fp; int num; struct user temp; num=0; if((fp=fopen(file,"rb"))==NULL) { printf("cannot open file!\n"); exit(1); } while(fread(&temp,sizeof(struct user),1,fp)) { num++; } fclose(fp); return num; }
struct user getuser() { void getname(char *name); void getperson_password(char *person_password); struct user temp; printf("请输入用户姓名(字符数<20): "); //读取相关开户信息 getname(temp.name); printf("请输入用户密码: "); getperson_password(temp.person_password); printf("输入开户金额:"); do{ //判断开户金额(>=100) scanf("%lf",&temp.money); fflush(stdin); if((temp.money)<100.0) printf("开户金额不能小于100\n"); else break; printf("重新输入开户金额："); } while(1); return temp; }
void getname(char *name) //函数功能：读取用户姓名(字符数<20)
{ do{ scanf("%s",name); fflush(stdin); if(strlen(name)==0) printf("姓名不能为空!\n"); else if(strlen(name)>=20) printf("姓名不能超过20个字符!\n"); else break; printf("重新输入姓名: "); }while(1); //循环以保证读入数据有效 }
void getperson_password(char person_password) //函数功能：读取用户密码 ) { do{ int i,mark; char ch; for(i=0,mark=0;;i++) //输入有效性判断(只能是数字) if((ch=getchar())!='\n') { if(ch<='9'&&ch>='0') person_password[i]=ch; else { printf("密码只能是数字!\n"); mark=1; break; } } else break; person_password[i]='\0'; if(mark==1) continue; if(strlen(person_password)!=6) printf("密码只能是6位!\n"); else break; printf("重新输入密码: "); }while(1); //循环以保证读入数据有效 } void select_id() //按照账号查询账户余额 { int count();
void getperson_password(charperson_password); printf("%30s\n","按照账号查询账户余额"); printf("%8s %15s %6s %10s\n","账号","用户姓名","密码","存款余额"); printf("---------------------------------------------\n\n");
FILE * fp;
struct user temp;
int i,maxnum;
char person_password[6];
if((fp=fopen(file,"rb"))==NULL)
{
printf("cannot open file!\n");
exit(1);
}
maxnum=count();
printf("输入要查询账号:"); //判断账号是否在记录中
scanf("%d",&i);
printf("输入账号密码:");
scanf("%s",&person_password);
if(i<1||i>maxnum)
{
printf("你要查询的账号不存在!");
return;
}
while(fread(&temp,sizeof(struct user),1,fp))//循环读取每一条记录判断是否为要查看的记录
if(temp.id==i&&strcmp(temp.person_password,person_password)==0) {
printf("NO.%d %15s %6s %.2f\n",temp.id,temp.name,temp.person_password,temp.money); } fclose(fp); }
void display() //显示用户资料 { printf("%30s\n","*用户资料显示"); printf("%8s %15s %6s %10s\n","账号","用户姓名","密码","存款余额"); printf("---------------------------------------------\n\n"); FILE * fp; struct user temp; if((fp=fopen(file,"rb"))==NULL) { printf("cannot open file!\n"); exit(1); } while(fread(&temp,sizeof(struct user),1,fp)) { printf("NO.%d %15s %6s %.2f\n",temp.id,temp.name,temp.person_password,temp.money); } fclose(fp); } void save_money() //存款 { printf("%30s\n","用户存款业务"); printf("---------------------------------------------\n\n"); int count(); void getperson_password(char *person_password); FILE *fp; int i,num,mark; struct user *temp; char person_password[6]; num=count(); //根据记录数申请空间 temp=(struct user )malloc(numsizeof(struct user)); if((fp=fopen(file,"rb"))==NULL) { printf("cannot open file!\n"); exit(1); } for(i=0;i<num;i++) //将文件内容存入数组 fread(&temp[i],sizeof(struct user),1,fp); fclose(fp); printf("输入要存款账号:"); //读取存款账号 scanf("%d",&mark); if(mark<1||mark>num) {
printf("你要存款账号不存在!");
return; } printf("输入账号密码:"); scanf("%s",&person_password); if((fp=fopen(file,"wb"))==NULL) //写方式打开文件，覆盖原文件中的内容 { printf("cannot open file!\n"); exit(1);
} for(i=0;i<num;i++) { if(temp[i].id==mark) { double money=0; printf("输入要存入的金额:"); scanf("%lf",&money); if(money<=0) { printf("只能为正数!\n"); money=0; }
temp[i].money +=money; //修改该用户的信息 } fwrite(&temp[i],sizeof(struct user),1,fp); } fclose(fp); free(temp); printf("你存款业务已办妥!\n"); }
void get_money() //函数功能：用户取款 { printf("%30s\n","用户取款业务"); printf("---------------------------------------------\n\n"); int count(); void getperson_password(char *person_password); FILE *fp; int i,num,mark; struct user *temp; char person_password[6]; num=count(); //根据记录数申请空间 temp=(struct user )malloc(numsizeof(struct user)); if((fp=fopen(file,"rb"))==NULL) { printf("cannot open file!\n"); exit(1); }
for(i=0;i<num;i++) //读取文件内容 fread(&temp[i],sizeof(struct user),1,fp); fclose(fp);
printf("输入要取款账号:"); scanf("%d",&mark); if(mark<1||mark>num) { printf("你要取款账号不存在!");
return; }
printf("输入账号密码:"); scanf("%s",&person_password); if((fp=fopen(file,"wb"))==NULL) { printf("cannot open file!\n"); exit(1); }
for(i=0;i<num;i++) //写方式打开文件，覆盖原文件中的内容 { if(temp[i].id==mark) { double money=0; printf("输入要取出的金额:"); scanf("%lf",&money); if(money<=0) //判断用户余额是否足够 { printf("只能为正数!\n"); money=0; } else if(money>temp[i].money) { printf("你的余额不足!\n"); money=0; }
temp[i].money -=money; } fwrite(&temp[i],sizeof(struct user),1,fp); } fclose(fp); free(temp); printf("你取款业务已办妥!\n"); }
void del() //销户
{
int count();
printf("%30s\n","***注销账户***");
printf("%8s %15s %15s %10s\n","账号","用户姓名","密码","存款余额");
printf("---------------------------------------------\n\n");
FILE * fp;
struct user temp;
int i,maxnum;
if((fp=fopen(file,"rb"))==NULL)
{
printf("cannot open file!\n");
exit(1);
}
maxnum=count(); //判断编号是否在记录中
printf("输入要销户账号:"); //判断编号是否在记录中
scanf("%d",&i);
if(i<1||i>maxnum)
{
printf("你要注销的账号不存在!");
return;
}
while(fread(&temp,sizeof(struct user),1,fp)) //循环读取每一条记录, if(temp.id==i&&temp.money==0.00) //余额为0 才可以销户 {temp.id=-1; printf("NO.%d %15s %15s %.2f\n",temp.id,temp.name,temp.person_password,temp.money); printf("%d\n",temp.id);
fwrite(&temp,sizeof(struct user),1,fp);//保存修改 printf("账户销户成功!\n");
} fclose(fp); } void jiaoyijilu() {
}
void print() //函数功能：输出界面
{
printf("%30s\n","***活期储蓄帐目管理系统***");
printf("---------------------------------------------\n\n");
printf("%8s,%-20s\n","1","储户开户");
printf("%8s,%-20s\n","2","查询账户余额");
printf("%8s,%-20s\n","3","显示用户信息");
printf("%8s,%-20s\n","4","存款");
printf("%8s,%-20s\n","5","取款");
printf("%8s,%-20s\n","6","储户销户");
printf("%8s,%-20s\n","7","退出");
printf("\n请选择功能(1~7):");
}
int main()
{ char choose; do{ print(); scanf(" %c",&choose); //读取功能标号，根据标号选择不同的函数 fflush(stdin); system("cls"); switch(choose) { case '1':
add(); break; case '2': select_id(); break; case '3': display(); break; case '4': save_money(); break; case '5': get_money(); break; case '6': del(); break; case '7': exit(1); default: printf("对不起，你所选择的功能不存在!\n"); } getch(); //暂停功能(读取任意键继续)(conio.h) system("cls"); //清除屏幕显示(stdlib.h) }while(1); }
折代码格式，看着头疼啊，不能格式化一下么