c语言如何修改密码！
#include<stdio.h>#include<stdlib.h>
#include<string.h>
#include<time.h>
#include<conio.h>
void mainmenu(); //主菜单
void reg(); //注册
void khfw(); //客户服务
void zzfw(); //自助服务
void getmoneynum(); //获取提款金额
void creditmoney(); //获取存款金额
void querymoney(); //查询余额
void hkmoney(); //开户金额
void exit(); //退出系统
void exchangepassword() ; //修改密码
//宏定义
int m=0; //money余额
char name[30]; //用户名
char password[7]; //用户密码
int k; //开户金额
struct consumer
{
char name[10];
char password[10];
}con1,con2;
void mainmenu()
{
while(1)
{
int x;
printf("\n\n\n\n\n\n");
printf("\t ******************************************************\n");
printf("\t ** **\n");
printf("\t ** **\n");
printf("\t ** **\n");
printf("\t **\t\t 欢迎进入使用ATM系统 v3.0\t **\n");
printf("\t ** **\n");
printf("\t ** **\n");
printf("\t ** **\n");
printf("\t ******************************************************\n");
printf("\t\t\t\t1----客户服务\n");
printf("\t\t\t\t2----用户注册\n");
printf("\t\t\t\t3----退出系统\n\n\n\n\n\n\n\n\n\n\n\n");
printf("请选择:\t\t");
scanf("%d",&x);
printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
if(x==3) break;
switch(x)
{
case 1:khfw();break;
case 2:reg();break;
}
printf("按任意键继续");
getch();
system("cls");
}
}
void reg()
{
printf("\n");
printf("\t ******************************************************\n");
printf("\t ** **\n");
printf("\t **\t\t 欢迎加入我们 \t **\n");
printf("\t ** **\n");
printf("\t ******************************************************\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
printf("请输入用户名:\t\t");
scanf("%s",&con1.name);
fflush(stdin);
printf("请输入密码:\t\t");
for(int j=0;j<7;j++)
{
con1.password[j]=getch();
if(con1.password[j]=='\r')
{
break;
}
putchar('*');
}
printf("\n");
hkmoney();
}
void hkmoney()
{
printf("请输入开户金额:\t\t");
scanf("%d",&k);
if(k>=10)
{
printf("恭喜你!注册成功!请按任意键继续....");
m=m+k;
}
else
{
printf("开户金额低于10元无法开户\n");
hkmoney();
}
getch();
system("cls");
mainmenu();
}
void khfw()
{
system("cls");
printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
printf("请输入用户名:\t\t");
fflush(stdin);
gets(con2.name);
printf("请输入密码:\t\t");
for(int j=0;j<7;j++)
{
con2.password[j]=getch();
if(con2.password[j]=='\r')
{
break;
}
putchar('*');
}
printf("\n");
if(!strcmp(con1.name,con2.name)&&!strcmp(con1.password,con2.password))
{
printf("登陆成功!请按任意键继续....");
getch();
system("cls");
zzfw();
}
else if(!strcmp(con1.name,con2.name))
{
printf("对不起，你用户名或密码输入有误!\n");
printf("请重新输入:\t");
getch();
system("cls");
khfw();
}
else
{
printf("对不起，你用户名或密码输入有误!");
getch();
system("cls");
khfw();
}
}
void zzfw()
{
int a;
printf("\t ******************************************************\n");
printf("\t ** **\n");
printf("\t **\t\t 客户服务 \t **\n");
printf("\t ** **\n");
printf("\t ******************************************************\n");
printf("\t\t\t\t1----取款\n");
printf("\t\t\t\t2----存款\n");
printf("\t\t\t\t3----余额查询\n");
printf("\t\t\t\t4----密码修改\n");
printf("\t\t\t\t5----返回主界面\n");
printf("\t\t\t\t6----退出系统\n\n\n\n\n\n\n\n\n\n\n\n\n");
printf("请选择服务:\t");
scanf("%d",&a);
switch(a)
{
case 1:getmoneynum();break; //取款
case 2:creditmoney();break; //存款
case 3:querymoney();break; //余额查询
case 4:exchangepassword();break; //密码修改
case 5:mainmenu();break; //返回主界面
case 6:exit();break; //退出
}
}
void getmoneynum()
{
int draw;
printf("请输入你要提款的金额:\t");
scanf("%d",&draw);
m=m-draw;
if(draw<0)
{
printf("输入不合法!请重新输入\n");
}
else if(m<draw)
printf("你的余额不足!\n");
else
{
printf("提款成功!你的余额为%d\n",m);
}
printf("请按任意键返回上一层....");
getch();
system("cls");
zzfw();
}
void creditmoney()
{
int bank;
printf("请输入你要存款的金额:\t");
scanf("%d",&bank);
m=m+bank;
if(bank<0)
{
printf("输入不合法!情重新输入\n");
}
else
{
printf("存款成功!你的余额为%d\n",m);
}
printf("请按任意键返回上一层....");
getch();
system("cls");
zzfw();
}
void querymoney()
{
printf("你的余额为%d元\n",m);
printf("按任意键返回上一层....");
getch();
system("cls");
zzfw();
}
void exchangepassword()
{
char newpassword[7];
printf("请输入原密码:\t");
fflush(stdin);
scanf("%s",password);
if(strcmp(con1.password,password))
{
printf("请输入新密码:\t");
scanf("%c",&newpassword);
password[7]=newpassword[7];
}
else
{
printf("对不起 你输入错误....请重新输入!");
exchangepassword();
}
}
void main()
{
mainmenu();
}
void exit()
{
system("cls");
printf("\n\n\n\n\n\n");
puts("\t\t\t********************************");
puts("\t\t\t** 谢谢你的使用 **");
puts("\t\t\t** 再见! **");
puts("\t\t\t********************************");
getch();
system("cls");
}
