help plz

help plz

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December 16, 2009 at 11:38 AM

Hi Friend,

Try the following:

1)
import java.util.*;

class InputDecimalNumber{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
double [] numbers = new double [5];
int sum=0;
for (int i=0; i<numbers.length; i++) {
int j=i+1;
System.out.println("Enter marks of subject "+j);
numbers[i]=input.nextDouble();
}
for(int i=0;i<numbers.length;i++){
int j=i+1;
System.out.println("Subject "+j+" = "+numbers[i]);
sum+=Math.round(numbers[i]);
}
System.out.println("Sum of integers="+sum);
System.out.println("Average of integers="+sum/5);

}
}

2)
import java.util.*;

class InputDecimalNumber{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter four digit number:");
int num=input.nextInt();
String number=Integer.toString(num);
char ch[]=number.toCharArray();
for(int i=0;i<ch.length;i++){
System.out.println(ch[i]);
}
}
}
3)
import java.util.*;
class StringReverse{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter string of 5 characters:");
String st=input.next();
char[]ch=st.toCharArray();
for(int i=st.length()-1;i>=0;i--){
System.out.print(ch[i]);
}
}
}
4)
import java.util.*;
import java.text.*;
class InputDecimalNumber{
public static void main(String[]args){
DecimalFormat f = new DecimalFormat("$###,###.### ");
Scanner input=new Scanner(System.in);
System.out.println("Enter total amount of milk:");
double totalMilk=input.nextDouble();
//1 milk carton can hold 3.78 liters of milk
double totalmilkCartons=totalMilk/3.78;
long milkCartons=Math.round(totalmilkCartons);
System.out.println("Number of milk cartons to hold "+totalMilk+" liters of milk is: "+milkCartons);
// cost of producing one liter of milk is $0.38
double CPofTotalMilk=totalMilk*0.38;
System.out.println("Cost of total milk is: "+f.format(CPofTotalMilk));
//profit on each carton of milk is $0.27
double totalProfit=milkCartons*0.27;
System.out.println("Total Profit is: "+f.format(totalProfit));
}
}

Thanks









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