C++字符没有被写入？

Question

我正在开展银行业务，但我遇到了一个奇怪的问题

cin >> task;

它应该启动一个开关。但它会不断跳过输入并结束程序。

我甚至有这方面的例子，该代码的作品，但这一个不，我不知道我做错了什么。

#include<iostream> 
#include<conio.h> 
#include<string> 
#include <ctype.h> 
using namespace  std; 

int main() 
{ 

    string name = ""; 
    int count; 

    char task; 
    double bal = 0; 

    int depo, withd; 
    cout << "Welcome to bank of the future! Please sign in" << endl; 

    cin >> name; 

    cout << "Enter your account number." << endl; 
    cin >> count; 
    cout << "Welcome back " << name << " What would you like to do?"; 

    cout << "\n A. Deposit \n B. Withdraw \n C. Show balance \n D. Quit" << endl; 


    cin >> task; 

    //just to check if it's being skipped over or not. 
    cout << "egg " << endl; 

    switch (task) 
    { 
    case 'A': 
     cout << "Enter an amount to deposit" << endl; 
     cin >> depo; 
     cout << "Prevous balance: " << bal << endl; 
     bal = bal + depo; 
     cout << "New balance: " << bal << endl; 
     break; 

    case 'B': 
     cout << "Enter an amount to withdraw" << endl; 
     cin >> withd; 
     cout << "Prevous balance: " << bal << endl; 
     bal = bal - withd; 
     cout << "New balance: " << bal << endl; 
     break; 
    case 'C': 
     cout << "Your current balance is " << bal << "\n For account: " << name << "Acount number: " << count << endl; 
     break; 
    case 'D': 
     cout << "Goodbye forever" << endl; 
     break; 

    } 


    return 0; 

} 

Answer 1

我认为这可能与字符大小写有关。在交换机中，您指定该任务是大写的。当我用大写字母尝试你的代码时，它对我很有用，但是当我输入一个小写字母时，它就结束了程序。