Really need help please/A switch expression of type `float' cannot be converted to an integral type, bool, char, string, enum or nullable type

Questions & Answers
1

I trying to make a enemy ai movement but i keep get a error i can’t find a way to fix it.
using UnityEngine;
using System.Collections;

public class Waves : MonoBehaviour {

	float aTemp;
	float bTemp;
	float dTemp;
	float cTemp;
	float x3Temp;
	float x2Temp;
	float x1Temp;


	GameObject enemy1;
	float nextWave;

	float path;
	
	public float Posy = 0f;
	public float Posx = 3.9f;
	int dirTemp;
	void Start () {
		nextWave = 2.0f;
	
	}
	
	// Update is called once per frame
	void Update () {
		if (Time.time > nextWave) {
			//random number determines the path equation
			path = Mathf.Floor (Random.Range(Posy, Posx));

			//random number determines direction of motion
			if (Random.Range (0.0f, 1.0f) < 0.5f) {
				dirTemp = 1;
			}
			// if(Random.Range(0.0, 1.0) <0.5)
			else {
				dirTemp = -1;
			}
			//else (Random.Range(0.0, 1.0) < 0.5)
		}
		

		switch (path) {
		case 1:
			aTemp = Random.Range (0.02f, 0.1f);
			x2Temp = Random.Range (-6.0f, 6.0f);
			dTemp = Random.Range (-3.0f, 5.0f);
			break;

		case 2:
			aTemp = Random.Range (1.0f, 3.0f);
			bTemp = Random.Range (0.2f, 0.4f);
			dTemp = Random.Range (0.0f, 5.0f);
			break;
		
		case 3:
			aTemp = Random.Range (1.0f, 3.0f);
			bTemp = Random.Range (0.2f, 0.4f);
			dTemp = Random.Range (-5.0f, 5.0f);
			break;
		default:
			print ("Waves.cs: Update(): path out of range");
			break;
		}
		//switch (path)

		// Instantiate the enemy with starting position and path to follow
		for (float i = 0; i < 5; i++) {
			if (path < 3) {
				instEnemy (dirTemp * (-12.0f - i * 2.0f), path);
			}// if (path < 3)
			else {
				instEnemy (14f + i * 2.0f, path); // x= f(y)
			} // else (path < 3)

		}// for 1
		nextWave += 5.0f;
		// if (Time.time > nextWave)
		// Update()
	}

	void instEnemy (float startPos, float path)
	{
		Vector3 pos = new Vector3(0.0f,0.0f);
		switch (path) {
		case 1:
			pos.x = startPos;
			pos.y = 0.0f;
			break;
		case 2:
			pos.x = startPos;
			pos.y = 0.0f;
			break;

		case 3:
			pos.x = 0.0f;
			pos.y = startPos;
			break;
		default:
			print ("Wave.cs: instEnemy(): path out of range");
			break;
		}// switch (path)
		pos.z = 0f;
		Instantiate (enemy1, pos, Quaternion.identity);
		Enemy1 other = GetComponent<Enemy1> ();
		other.path = path;
		other.a = aTemp;
		other.b = bTemp;
		other.c = cTemp;
		other.d = dTemp;
		other.x3 = x3Temp;
		other.x2 = x2Temp;
		other.x1 = x1Temp;
		other.dir = dirTemp;
	} // instEnemy
}

and having some other error too

Assets/Waves.cs(87,17): error CS0151: A switch expression of type `float’ cannot be converted to an integral type, bool, char, string, enum or nullable type

Assets/Waves.cs(108,23): error CS0266: Cannot implicitly convert type float' to int’. An explicit conversion exists (are you missing a cast?)

2

path is a float. You declare it as such on line 15:

float path;

But you’re using it in a lot of switch statements to compare to integer values - case 1:, case 2: etc. You can’t use float values in switch statements as the error message states, because they’re inherently imprecise. So just declare it as an int instead:

int path;
3

Indeed, floats are limited by switch statements. A workaround is to cast it to int, and, since you are using integers on the switch, then use:
switch ((int) path) {}.
Alternatively, if you wish to work with decimals, use an if/then/else.