Question

This is for a java program

public class Calculation {
   public static void main(String[] args)
{
int num; // the number to calculate the sum of squares
double x; // the variable of height
double v; // the variable of velocity
double t; // the variable of time

System.out.println("**************************");
System.out.println(" Task 1: Sum of Squares");
System.out.println("**************************");

//Step 1: Create a Scanner object
  

//Task 1. Write your code here
//Print the prompt and ask the user to enter an integer
System.out.println("Please enter an integer larger than 0: ");

//Step 2: Get an integer from the user and assign it to the variable num.

//Step 3: Check the value of num. Print an error message if it's less than 1.
// Otherwise, call sumSquare method and print the returned value.
  

System.out.println("**************************");
System.out.println(" Task 2: Displacement");
System.out.println("**************************");

//Task 2. Write your code here.
//Print the prompt and ask the user to enter three double values separated by space.
System.out.println("Please enter three double values for x, v, and t(separated by space): ");

//Step 4: Write three statements here to get the double values from the user and
// assign them to the variables x, v, and t.

//Step 5: Call the displacement method with the three variables x, v, and t,
// and print the returned value.
  

}

public static int sumSquare (int number) {

int sum = 1;

//Step 6: Check the value of the parameter number. If number is equal to 1, return sum directly.
  

//Step 7: Calculate the sum of the squares from 1 to the value of number using a for loop.

//Step 8: Return sum
  

}

public static double displacement (double x, double v, double t) {

//Step 9: Declare a constant G and assign it to be 9.78.
  

//Step 10: Calculate the displacement and return it.
  

}

}

Answer 1

Step 1:

Scanner in =new Scanner(System.in);

Step 2:

num=in.nextInt();

Step 3:

if(num<1)
System.out.println("Error");
else

System.out.println(sumSquare(num));

Step 4:

x=in.nextDouble();
v=in.nextDouble();
t=in.nextDouble();

Step 5:

System.out.println(displacement(x,v,t));

Step 6:

if(number==1)return 1;

Step 7:

for(int i=1;i<=number;i++)
sum+=(i*i);

Step 8:

return sum;

Step 9:

final double G=9.78;

Step 10:

return x +(v*t +0.5*G*t*t);