in c# public static void plusMinus(List arr) {

    int positiveNum =0  ,  negativeNum=0 ,  zeros =0;
    int size = arr.Count(); 
    foreach(int x in arr ){
        if(x >0 ){
            positiveNum++;
        }    
         else if (x<0){
             negativeNum ++;
         }
         else{
             zeros++;
         }    
    }
    Console.WriteLine((positiveNum/(double)size).ToString("F6"));
    Console.WriteLine((negativeNum/(double)size).ToString("F6"));
    Console.WriteLine((zeros/(double)size).ToString("F6"));
}