内部循环似乎可以正常工作，但是一旦程序进入switch语句，它似乎会无限循环循环切换条件。因此，我相信外部的while循环使它不断地写入，而不是一次写入控制台。只有将flag设置为false的情况才会按预期停止。
有人可以解释发生了什么吗？我将如何更新标志，以便外部while循环不会无休止地执行开关中的功能？在所有情况下，程序都应返回到用户菜单并等待输入，除非用户选择7结束程序。我已经盯着这个看了好几个小时了。请指导我！
using System;
using static System.Console;
using System.Collections.Generic;
namespace Project02AreaCalculator
{
class Program
{
static private bool flag = true;
static void Main(string[] args)
{
string inputvalue = "";
int caseSwitch;
// repeat program until flag is set to false by user selecting 7 to exit
do
{
// repeat menu until user input can be parsed into an integer
while (!int.TryParse(inputvalue, out caseSwitch))
{
flag = false;
Console.WriteLine("Shape Area Calculator");
Console.WriteLine("******************************************");
Console.WriteLine("\t1. Circle");
Console.WriteLine("\t2. Square");
Console.WriteLine("\t3. Rectangle");
Console.WriteLine("\t4. Rhombus");
Console.WriteLine("\t5. Parallelogram");
Console.WriteLine("\t6. Trapezoid");
Console.WriteLine("\t7. Exit");
Console.WriteLine("******************************************");
Console.WriteLine("Select a shape type to calculate");
inputvalue = ReadLine();
}
//convert input to integer and assign to caseSwitch
caseSwitch = Convert.ToInt32(inputvalue);
switch (caseSwitch)
{
case 1:
CalculateCircle();
//Clear();
flag = true;
break;
case 2:
CalculateSquare();
// Clear();
flag = true;
break;
case 3:
CalculateRectangle();
//Clear();
flag = true;
break;
case 4:
CalculateRhombus();
//Clear();
flag = true;
break;
case 5:
CalculateParallelogram();
//Clear();
flag = true;
break;
case 6:
CalculateTrapezoid();
//Clear();
flag = true;
break;
case 7:
//Clear();
Console.WriteLine("Goodbye! Press any key to end");
ReadKey();
flag = false;
break;
default:
// Clear();
Console.WriteLine("Invalid Selection, Select 1-7");
flag = true;
break;
}
} while (caseSwitch != 7);
}//end main
//****************METHODS SECTION ****************************************************************************
static private void CalculateCircle()
{
//area = pi * radius * radius (or pi times radius squared)
Console.Clear();
Console.WriteLine("Circle Area Calculator");
Console.WriteLine("Enter the length of the circle's radius (-1 to exit back to menu):");
Console.ReadKey();
}
static private void CalculateSquare()
{
//area = side * side (or side squared)
Console.Clear();
Console.WriteLine("Square Area Calculator");
Console.WriteLine("Enter the length of one side of the square (-1 to exit back to menu):");
Console.ReadKey();
}
static private void CalculateRectangle()
{
//area = Length * Width
Console.Clear();
Console.WriteLine("Rectangle Area Calculator");
Console.WriteLine("Enter the length of one side of the Rectangle (-1 to exit back to menu):");
Console.WriteLine("Enter the length of an opposing side of the Rectangle (-1 to exit back to menu):");
Console.ReadKey();
}
static private void CalculateRhombus()
{
//area = ½ a * b (a and b being diagonals)
Console.Clear();
Console.WriteLine("Rhombus Area Calculator");
Console.WriteLine("Enter the length of one diagonal of the rhombus (-1 to exit back to menu):");
Console.WriteLine("Enter the length of the other diagonal of the rhombus (-1 to exit back to menu):");
Console.ReadKey();
}
static private void CalculateParallelogram()
{
//area = base * height
Console.WriteLine("Parallelogram Area Calculator");
Console.WriteLine("Enter the length of the base of the Parallelogram (-1 to exit back to menu):");
Console.WriteLine("Enter the height of the Parallogram (-1 to exit back to menu):");
Console.ReadKey();
}
static private void CalculateTrapezoid()
{
//area = ½ height * (largeBase + smallBase)
Console.WriteLine("Trapezoid Area Calculator");
Console.ReadKey();
}
}
}
我正在尝试为C＃控制台程序利用2个while循环。外部是重复程序菜单和功能，直到用户退出。我正在使用内部循环作为用户输入的验证（其中...