Problems with converting string to int-CodePudding

I am trying to convert a string to a int like this in Unity (thank you Franz Gleichmann for answering twice now i've got new errors) here is the code:

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO.Ports;

public class Move : MonoBehaviour {

    SerialPort sp = new SerialPort("/dev/tty.usbmodem1411", 9600); // set port of your arduino connected to computer
    
    public bool on = false;
    public int speed = 0;
    public string A;
    public string B;

    void Start () {
        sp.Open();
        sp.ReadTimeout = 1;
    }

    void Update () {
        A = sp.ReadLine();
        if (sp.IsOpen) {
            try {
                if (on) {

                    bool isParsable = Int32.TryParse(A, out B);

                    if (isParsable)
                    {
                        Console.WriteLine(B);
                    }
                    else
                    {
                        Console.WriteLine("Could not be parsed.");
                    }
                    transform.Translate(Vector3.left   (Time.deltaTime * B / speed));   //error on this line
                    
                }
            } catch (System.Exception) {
            }
        }
    }
}

The aim of this script is to take a number from a USB and move an object by that amount. However, Unity gives me this error:

Assets/scripts/Move.cs(37,41): error CS0019: Operator ' ' cannot be applied to operands of type 'Vector3' and 'float'

Any answers will help, if you want you can write your own version of the script. Thanks.

CodePudding user response：

If you check the c# documentation of the Int32.TryParse function, you will notice the second parameter is of type Int32.

Your error:

CS1503: Argument 2: cannot convert from 'out string' to 'out int'

Is telling that your B variable should be Int32 to be able to store the result of the Int32 data.

public string A;
public Int32 B;

When you change that B variable to a numeric type, your second error Operator '*' cannot be applied to operands of type 'float' and 'string' raised at this line would also dissapear.

transform.Translate(Vector3.left   (Time.deltaTime * B / speed));

Some advice: You should start giving more meaningful names to your variables.

CodePudding user response：

You must use int instead of Int32 So your code should look like this

bool isParsable = int.TryParse(A, out B);