读取文本文件并将第一行乘以其他行中的每一行
本文关键字:一行 其他 读取 文件 取文本 | 更新日期: 2024-09-23 10:31:37
我正在做这项作业,我需要读取一个整数文本文件,将数字存储到数组中。然后将每行中的数字平方(25之后),然后将平方除以25,然后检查结果是否大于150
我陷入困境的地方是读取每一行的数字,并像我应该的那样在我的方法中使用它们,到目前为止,我的循环和数组打印将每个数字按顺序放在文件中。
我真的很感谢在阵列部分的任何帮助,谢谢。
这是文本文件:
25 150
60
63
61
70
72
68
66
68
70
因此,取Math.Pow(60,2) / 25
和Math.Pow(63,2) / 25
,依此类推。如果高于150,则打印"是",如果低于150 则打印"否"
以下是我所拥有的:我有另一班
class Resistors
{
//declare variables for the resistance and the volts.
private int resistance;
private int volts;
public Resistors(int p1, int p2)
{
resistance = p2;
volts = p1;
}
//GetPower method.
//purpose: to get calculate the power dissipation of the resistor.
//parameters: it takes two intigers.
//returns: the total power as a double.
public double GetPower()
{
return (Math.Pow(volts, 2) / resistance);
}
}
这是剩下的。
static void Main(string[] args)
//declare some variables and an array.
const int MAX = 50;
string inputLine = "";
Resistors[] resistor = new Resistors[MAX];
//declare a counter and set to zero
int count = 0;
// This line of code gets the path to the My Documents Folder
string environment = System.Environment.GetFolderPath
(System.Environment.SpecialFolder.Personal) + "''";
WriteLine("Resistor Batch Test Analysis Program");
WriteLine("Data file must be in your Documents folder");
Write("Please enter the file name: ");
string input = Console.ReadLine();
// concatenate the path to the file name
string path = environment + input;
// now we can use the full path to get the document
StreamReader myFile = new StreamReader(path);
while (inputLine != null)
{
inputLine = myFile.ReadLine();
if (inputLine != null && count < MAX)
{
string[] data = inputLine.Split();
int dataR = int.Parse(data[0]);
string[] pie = inputLine.Split();
int pieV = int.Parse(pie[0]);
resistor[count++] = new Resistors(dataR, pieV);
}
}
WriteLine("Res#'tDissipitation'tPassed");
for (int j = 0; j < count; j++)
{
WriteLine("{0:d}'t{1:N}", j + 1, resistor[j].GetPower());
}
ReadKey();
}
我认为这应该满足您的需要:
编辑:
根据你的评论,如果你想在第一行读取多个值,你可以用逗号分隔它们,然后在上拆分
25,150
60
63
61
70
72
68
66
68
70
static void Main(string[] args)
{
// This line of code gets the path to the My Documents Folder
string environment = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal) + "''";
Console.WriteLine("Resistor Batch Test Analysis Program");
Console.WriteLine("Data file must be in your Documents folder");
Console.Write("Please enter the file name: ");
string input = Console.ReadLine();
// concatenate the path to the file name
string path = environment + input;
// Will read all lines
var lines = File.ReadAllLines(path).ToList();
// Will get the first line arguments and split them on the comma, you add more arguments if need, just separate them by a comma
var firstLineArgs = lines[0].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
.Select(t => Convert.ToInt32(t))
.ToArray();
// Will skip the first line arguments and parse all the following numbers
var numbers = lines.Skip(1)
.Select(t => Convert.ToInt32(t))
.ToList();
// Will create each Resistors object with the first line arguments (25) and the actual number
// You can do whatever you want with the second arguments (150)
var resistors = numbers.Select(t => new Resistors(firstLineArgs[0], t))
.ToList();
Console.WriteLine("Res#'tDissipitation'tPassed");
foreach (var item in resistors)
{
// Check if item.GetPower() is greather firstLineArgs[1] (150)
// I don't know what you want to do if it's greater
Console.WriteLine("{0:d}'t{1:N}", resistors.IndexOf(item) + 1, item.GetPower());
}
Console.ReadKey();
}
您会发现,您编写的代码使用输入文件的第1行和第2行,然后使用第3行和第4行,然后用第5行和第6行调用电阻构造函数。。。
您的描述表明您希望保留第一行,然后在构造每个电阻器对象时使用它。也许我误解了你的问题。您可能需要考虑显示几个输出点与预期输出点。
此外,您的"inputLine.Splitt()"也是不必要的。您可以解析inputLine字符串。
让我从你的代码中提取几行:
if (inputLine != null && count < MAX)
{
string[] data = inputLine.Split();
int dataR = int.Parse(data[0]);
string[] pie = inputLine.Split();
int pieV = int.Parse(pie[0]);
}
实际上,您使用split()也在做同样的操作;而且Split()
在那里是不必要的,你可以用int dataR = int.Parse(inputLine);
和int pieV = int.Parse(inputLine);
实现同样的效果
从你在问题中提到的例子来看
取Math.Pow(60.2)/25和Math.Pow(63,2)/25,依此类推。
您必须将文件中的第一个值分配为resistance
,如果是这样(我理解正确),您可以使用以下代码完成整个操作:
List<string> stringArray = File.ReadAllLines(@"filePath").ToList();
List<int> intList= stringArray.Select(x => x!=null || x!="" ?0:int.Parse(x)).ToList();
//Now `intList` will be the list of integers, you can process with them;
int resistance=intArray[0];
for (int i = 1; i < intArray.Count ; i++)
{
resistor[i] = new Resistors(intArray[i], resistance);
}
你也可以试试你的代码:
StreamReader myFile = new StreamReader(@"path_here");
const int MAX = 50;
string inputLine = "";
// Resistors[] resistor = new Resistors[MAX];
int count = 0;
int resistance = 0;
while (inputLine != null)
{
inputLine = myFile.ReadLine();
if (inputLine != null && count < MAX)
{
int inputInteger = int.Parse(inputLine);
if (count == 0) { resistance = inputInteger; }
resistor[count++] = new Resistors(inputInteger, resistance);
}
}