C# と VB.NET の質問掲示板

■No81378 (riiiya さん) に返信
こんな感じかしら

void test()
{
    String value = "1+1";
    int left = 0;
    int right = 0;
    char operatorName = '\0';
    
    for (int i = 0; i < value.Length; i++)
    {
        if (char.IsNumber(value, i))
        {
            if (i == 0)
            {
                left = int.Parse(value[i].ToString());
            }
            else if (i == 2)
            {
                right = int.Parse(value[i].ToString());
            }
        }
        else if (i == 1)
        {
            operatorName = value[i];
        }
    }

    int result = calculate(left, right, operatorName);
}

int calculate(int left, int right, char operatorName)
{
    if (operatorName == '+')
    {
        return left + right;
    }
    else
    {
        return 0;
    }
}