Write a program to round a number to the next multiple of 10 given the following conditions?

Write a program to Round a number to the next multiple of 10 if its ones digit is 5 or more, otherwise round it the previous multiple of 10.So, 25 and 26 round to 30 where as 23 and 24 round to 20. 20 also rounds to 20. You have been given 4 ints as input. Round each of the input values and return their sum.

MyApproach

I created 2 functions in the first function I counted the sum of all 4 numbers.

In the second function I checked the UnitDigtit if>=5 &&<=9 Then proceed with set of statements given in the question.

else

I checked if Its a one digit or two or any digit number.If One digit I returned num=0 else I proceded with the sets of statements.

Sample Input #1

sumRounded(11,15,23,30)

Sample Output #1

80 (11 rounds to 10, 15 to 20, 23 to 20 and 30 to 30)

Sample Input #2

sumRounded(1,3,7,9)

Sample Output #2

20

public int sumRounded(int num1, int num2, int num3, int num4)
{

    int a=checkRound(num1);
    int b=checkRound(num2);
    int c=checkRound(num3);
    int d=checkRound(num4);
    return a+b+c+d;
}   

public int checkRound(int num)
 {
      int a=num%10;
      if((a>=5) &&(a<=9))
      {
         if(a==5)
          {
              num=num+5;
          }
         else if(a==6)
          {
               num=num+6;
          }
          else if(a==7)
          {
                num=num+7;
          }
          else if(a==8)
          {
                num=num+8;
          }
          else if(a==9)
          {
               num=num+9;
          }
          return num;
       }
         else
         {
             if((num/10)!=0)
             {
                 if(a==1)
                    {
                        num=num-1;
                    }
                 else if(a==2)
                    {
                        num=num-2;
                    }
                 else if(a==3)
                    {
                        num=num-3;
                    }
                 else if(a==4)
                    {
                        num=num-4;
                    }
                 return num;
             }
             else
             {

              return num=0;
             }
          }



     }

Parameters Actual Output Expected Output

'289' '3' '25' '308' 644 630