switch E1578

[aanttilaa]

Problems with line 25.
number "3" gets underlined and puts out an error message " E1578 case label value has already appeared in this switch at line 22"
if i remove "1" from line 22 the error goes away.

#include <iostream>
#include <string>

using namespace std;

int main()
{
	//här skrivs den huvudsakliga programkoden....
	int points, grade;
	

	cout << "enter points  " << endl;
	cin >> points;


	grade = 0.25*points - 1.5;

	switch (grade) {
		case 0:
			cout << " vitsordet = 0 som är underkänt " << endl;
			break;
		case 1 && 2:
			cout << " vitsordet = 1 som är nöjaktigt" << endl;
			break;
		case 3 && 4: // "3" gets underlined
			cout << "vitsordet = 3" << endl;
			break;
		case 5:
			cout << "vitsordet = 5 som är utmärkt" << endl;
		default: 
			cout << "dont cheat" << endl;
	}





	system("pause");
	return 0;
}

[Peter87]

You can't use expressions as case labels (you can but it's not going to do what you expect) so instead you have to write two of them after each other.

case 1:
case 2:
	cout << " vitsordet = 1 som är nöjaktigt" << endl;
	break;