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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int password = 123456;
int balance = 10000;
bool isLogined = false;
void alert(char *content);
int getValidOperation(int maxNum);
void quit(int status);
void query();
void isContinue();
bool inputPassword();
void takeMoney();
void changePsw();
int main(int argc, const char * argv[]) {
bool result;
while (1) {
alert("1.输入密码\n2.取款\n3.查询余额\n4.更改密码\n5.退出");
int operation = INT32_MAX;
operation = getValidOperation(5);
switch (operation) {
//1.输入密码
case 1:
result = inputPassword();
if (result == false) {
quit(EXIT_SUCCESS);
}else{
isLogined = true;
}
break;
//2.取款
case 2:
takeMoney();
isContinue();
break;
//3.查询余额
case 3:
query();
isContinue();
getchar();
break;
//4.更改密码
case 4:
changePsw();
break;
//5.退出
case 5:
quit(EXIT_SUCCESS);
default:
break;
}
printf("\n");
}
return 0;
}
void alert(char *content){
printf("****************\n");
printf("%s\n", content);
printf("****************\n");
}
int getValidOperation(int maxNum){
int operation;
printf("选一个吧:");
scanf("%d", &operation);
while (operation < 1 || operation > maxNum) {
printf("别搞笑，好好输：");
getchar();
scanf("%d", &operation);
}
return operation;
}
void quit(int status){
alert("拔卡！拔卡！拔卡！");
exit(status);
}
void query(){
if (isLogined == false) {
bool result = inputPassword();
if (result == false) {
quit(EXIT_SUCCESS);
}else {
isLogined = true;
}
}else{
printf("****************\n");
printf("你还有￥%d\n", balance);
printf("****************\n");
}
}
void isContinue(){
char choose;
alert("继续不？(y/n)：");
getchar();
scanf("%c", &choose);
while (choose != ‘y‘ && choose != ‘n‘) {
printf("好好输！(y/n)\n");
getchar();
scanf("%c", &choose);
}
if (choose == ‘n‘) {
quit(EXIT_SUCCESS);
}
}
bool inputPassword(){
int inputedpassword = INT32_MAX;
int totalWrongTime = 3;
do {
printf("%s", inputedpassword == INT32_MAX ? "密码是啥：": "别骗我！密码是啥：");
getchar();
scanf("%d", &inputedpassword);
totalWrongTime--;
} while (inputedpassword != password && totalWrongTime > 0);
if (inputedpassword != password) {
return false;
}else{
return true;
}
}
void takeMoney(){
if (isLogined == true) {
int totalMoney;
int num2_1;
alert("1.￥100\n2.￥300\n3.￥500\n4.其他金额");
num2_1 = getValidOperation(4);
switch (num2_1) {
case 1:
totalMoney = 100;
break;
case 2:
totalMoney = 300;
break;
case 3:
totalMoney = 500;
break;
case 4:
printf("取多少：");
scanf("%d", &totalMoney);
break;
default:
break;
}
if (totalMoney <= balance) {
printf("\n您的余额为：￥%d\n \n", balance -= totalMoney);
}else {
printf("\n穷B，钱不够！\n \n");
}
}else{
bool result = inputPassword();
if (result == false) {
quit(EXIT_SUCCESS);
}else {
isLogined = true;
}
}
}
void changePsw(){
if (isLogined == false) {
bool result = inputPassword();
if (result == false) {
quit(EXIT_SUCCESS);
}else {
isLogined = true;
}
}else{
printf("输入新密码：\n");
scanf("%d", &password);
}
}
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原文地址：http://www.cnblogs.com/immustard/p/5026822.html
