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#include <stdio.h>
#include <stdlib.h>
int main(int argc, const char * argv[]) {
int password = 123456;
int balance = 100000;
char operation;
int wrongTime = 1;
int inputedPassword;
int z = 0; //状态值
while (1) {
printf("****************\n");
printf("1.输入密码\n2.取款\n3.查询余额\n4.更改密码\n5.退出\n");
printf("****************\n");
printf("选一个吧:");
scanf("%c", &operation);
while (operation < ‘1‘ || operation > ‘5‘) {
printf("别搞笑，好好输：");
getchar();
scanf("%c", &operation);
}
switch (operation) {
//1.输入密码
case ‘1‘:
printf("密码是啥：");
scanf("%d", &inputedPassword);
while (wrongTime < 3 && inputedPassword != password) {
printf("别骗我！\n你还有%d次机会:", 3 - wrongTime);
scanf("%d", &inputedPassword);
wrongTime++;
}
if (inputedPassword == password){
//正确
printf("****************\n");
printf("\n输对了，牛逼啊！\n \n");
printf("****************\n");
z = 1;
} else{
//次数过多
printf("****************\n");
printf("错多了！狗带吧！\n");
printf("****************\n");
exit(EXIT_SUCCESS);
}
getchar();
break;
//2.取款
case ‘2‘:
if (z == 1) {
while(1) {
int totalMoney;
int num2_1;
printf("****************\n");
printf("1.￥100\n2.￥300\n3.￥500\n4.其他金额\n");
printf("****************\n");
scanf("%d", &num2_1);
if (num2_1 == 1) {
totalMoney = 100;
}else if (num2_1 == 2){
totalMoney = 300;
}else if (num2_1 == 3){
totalMoney = 500;
}else if (num2_1 == 4){
printf("取多少：");
scanf("%d", &totalMoney);
}else {
printf("别搞笑，好好输\n");
continue;
}
if (totalMoney <= balance) {
balance -= totalMoney;
printf("\n您的余额为：%d\n \n", balance);
}else {
printf("\n穷B，钱不够！\n \n");
}
printf("****************\n");
printf("1.继续取款\n2.任意数字键退出\n");
printf("****************\n");
int num2_2;
scanf("%d", &num2_2);
if (num2_2 == 1) {
continue;
}else {
break;
}
}
}
printf("大兄弟，输密码先！");
getchar();
break;
//3.查询余额
case ‘3‘:
if (z == 1) {
printf("你还有￥%d\n", balance);
}else{
printf("大兄弟，输密码先！");
}
getchar();
break;
//4.更改密码
case ‘4‘:
if (z == 1) {
printf("输入新密码：\n");
scanf("%d", &password);
}else{
printf("大兄弟，输密码先！");
}
getchar();
break;
//5.退出
case ‘5‘:
printf("拔卡！拔卡！拔卡！\n");
exit(EXIT_SUCCESS);
default:
break;
}
printf("\n");
}
return 0;
}
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原文地址：http://www.cnblogs.com/immustard/p/5026791.html
