如何在C# IronTesseract中动态适配运算符号实现无分支判断

开发者阿泽

2026-8-20

解决方案

核心思路

从OCR识别结果里提取实际存在的运算符（+或-）
用该运算符分割文本得到两个数字字符串
通过运算符映射对应的计算逻辑，避免重复if判断

修改后的完整代码

var Ocr = new IronTesseract();
string? path = Console.ReadLine();
string[] Signs = {"+", "-"};

using (var Input = new OcrInput(path))
{
    var Result = Ocr.Read(Input);
    // 提取文本中存在的运算符
    var operatorSign = Signs.FirstOrDefault(s => Result.Text.Contains(s));
    
    if (!string.IsNullOrEmpty(operatorSign))
    {
        Console.Clear();
        string TrimmedResult = Result.Text.Trim();
        // 用提取到的运算符分割字符串
        string[] numbers = TrimmedResult.Split(new[] { operatorSign }, StringSplitOptions.RemoveEmptyEntries);
        
        if (numbers.Length == 2 
            && int.TryParse(numbers[0].Trim(), out int firstNumber) 
            && int.TryParse(numbers[1].Trim(), out int secondNumber))
        {
            Console.WriteLine($"{firstNumber} is the first number.");
            Console.WriteLine($"{secondNumber} is the second number.");
            
            // 根据运算符执行对应计算
            int resultMath = operatorSign switch
            {
                "+" => firstNumber + secondNumber,
                "-" => firstNumber - secondNumber,
                _ => 0 // 兜底，实际前面判断过不会走到这
            };
            
            Console.WriteLine(resultMath);
        }
        else
        {
            Console.WriteLine("无法识别有效的数字运算式");
        }
    }
    Console.ReadKey();
}