public class exempel4
{
	public static void main(String args[])
	{
		float a;
		float b;
		float svar = 0;
		char op = '0';
		char mode = 'n';
		
		while(mode != 'y')
		{
			System.out.println("Detta program utfor berakningen a op b (dar op ar + eller -)");
		
			a = input.readFloat();
			op = input.readChar();
			b = input.readFloat();
		
			if(op == '+') 
			{
				svar = a + b;
				System.out.println("Summan ar: " + svar);
			}
			else if(op == '-') 
			{
				svar = a - b;
				System.out.println("Differensen ar: " + svar);	
			}
			else System.out.println("Du gav fel tecken!");
			
			System.out.println("Do you want to quit? (y/n)");
			mode = input.readChar();
		}
	}
}