C++菜单。无限循环菜单

嘿，任何人都可以看到我的菜单在while循环中出现什么问题，如果我在无限循环中按1，它会一直打印出dixie。我在菜单周围有一段时间循环，以便菜单总是在那里让用户返回选择。这里是我的代码：C++菜单。无限循环菜单

#include <iostream> 
using namespace std; 

int main() 
{ 
    int choice; 
    bool menu = true; 
    cout <<"========Welcome to the database menu========\n"; 

    cout << "Press 1 to insert a new record at a particular position\n" 
      "Press 2 to delete a record from a particular position\n" 
      "Press 3 to search the database and print results\n" 
      "Press 5 to find the average experience points of players at a particular level\n" 
      "Press 6 to find and remove all duplicate entries\n" 
      "Press 0 to quit\n\n\n\n\n\n\n\n\n"; 

    cout << "Choice: "; 
    cin >> choice; 
    //***************************************************************************** 
    // Switch menu to display the menu. 
    //***************************************************************************** 
    while(menu) 
    { 
     switch (choice) 
     { 
      case 1: 
       cout << "dixie"; 
       break; 
      case 2: 
       cout << "bexie"; 
       break; 
      default: 
       cout<< "That is not a choice!!!\n"; 
     } 
    }  
    getchar(); 
    getchar(); 
}

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2012-04-15 Pendo826

它说while (menu)这意味着它会继续这样做，直到你设置菜单false。

此外，我想你想在循环中添加cin >> choice，或者它只是一次又一次地重复选择。

来源

2012-04-15 12:58:19

谢谢你得到它的建议。非常感谢。 – Pendo826 2012-04-15 13:06:06

没有代码，可以改变任何menu或choice您while循环内。所以一旦它开始，它永远不会停止。

来源

2012-04-15 12:58:14

因此，如果我选择了一个案件但仍然显示菜单选项，我将如何阻止它从loopin？ – Pendo826 2012-04-15 13:01:51

问题是你的循环处于错误的地方。循环直到用户选择'0'为止，但你必须在'switch'语句中处理'0'。查看我的答案，了解可能的解决方案，以便“while”循环应该去。 – 2012-04-15 13:03:59

我会想，while循环应该包括打印菜单选项，并让用户选择像这样一个选项：

while (menu) 
{ 
    cout <<"========Welcome to the database menu========\n"; 
    cout << "Press 1 to insert a new record at a particular position\n" 
      "Press 2 to delete a record from a particular position\n" 
      "Press 3 to search the database and print results\n" 
      "Press 5 to find the average experience points of players at a particular level\n" 
      "Press 6 to find and remove all duplicate entries\n" 
      "Press 0 to quit\n\n\n\n\n\n\n\n\n"; 

    cout<< "Choice: "; 
    cin>> choice; 

    switch (choice) 
    { 
     case 1: 
      cout << "dixie"; 
      break; 
     case 2: 
      cout << "bexie"; 
      break; 
     default: 
      cout<< "That is not a choice!!!\n"; 
    } 
}

另一种可能性是刚刚cout << "Choice: "线之前启动while循环。

来源

2012-04-15 12:58:33

menu变量总是在true的循环内。现在和while(true)一样。

来源

2012-04-15 13:21:43 Alex

C++菜单。无限循环菜单

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