Thread: Please need a help with my homework (math methods)

Hello, I really need some help on some Java programming homework that is due tonight&tomorrow. Here is the homework (3 problems):

1) (Displaying a Square of Asterisks) Write a method squareOfAsterisks that displays a solid square (the same number of rows and columns) of asterisks whose side is specified in integer parameter
side. For example, if side is 4, the method should display

****
****
****

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2) (Circle Area) Write an application that prompts the user for the radius of a circle and uses a method called circleArea to calculate the area of the circle.

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3) (Hypotenuse Calculations) Define a method hypotenuse that calculates the hypotenuse of
a right triangle when the lengths of the other two sides are given. The method should take two arguments of type double and return the hypotenuse as a double. Incorporate this method into an application that reads values for side1 and side2 and performs the calculation with the hypotenuse method. Use Math methods pow and sqrt to determine the length of the hypotenuse for each of the
triangles in Fig. 6.15. [Note: Class Math also provides method hypot to perform this calculation.]

bAs1r.png

thanks in advance!

Yes, also we have to use the main to call the methods.

I'm having a problem creating the whole code, I don't know how to use math methods to solve these problems..

For the first problem, I have tried this code but still wrong!

public class SquareAst
 
{
 
	public static void main (String [args]){
 
		sq();
 
public static void Sq ( int n1 )   
 
 
 
    {
 
     for (int n = 1; n <= n1; n++)
 
      {
 
        for (int m = 1; m <= n1; m++)
 
        {
 
         System.out.print("*");
 
            }
 
        System.out.println();
 
      }
 
       }
 
 
}
}

1. take number from user using scanner class, and run loop inner and outer loop to print square *
2. take radius from user using scanner class, calculate area=pie*radius
3. take perpendicular and base from user using scanner class, now apply the theorem " h*h = p*p + b*b ", you will get all the answer by making function...

can you show me in simple codes please,

thank you for your post

Exception in thread "main" java.lang.Error: Unresolved compilation problems:
void is an invalid type for the variable Sq
Syntax error on token "(", ; expected
Syntax error on token ")", ; expected

at SquareAst.main(SquareAst.java:9)

1. How to print * Square

class Square
{
psvm(String args[])
{
// take input from user in max variable; like max=5

for (i=0;i<max;i++)
{
for (j=0;j<max;j++)
{
//print statement
}
//print statement for next line
}

}// your program ends here......

}
//I hope this is helpful to you.........

--- Update ---

2. How to calculate circle area

class Circle
{
psvm(String args[])
{
// take input from user in radius variable; like max=10

int area=pie*radius*radius;
///print area
}// your program ends here......

}
--- Update ---

[/COLOR]3. How to calculate H-side

class Triangle
{
psvm(String args[])
{
// take input from user in perp and base variable; like perp=12 and base =5

int h_side=SQRT(perp*perp+base*base);
///print H-side
}// your program ends here......

}

public class Square {
 
 
	public static void main(String[] args) {
 
 
		int max=5;
 
 
		for (int i=0;i<max;i++)
		{
 
		for (int j=0;j<max;j++)
 
		{
 
		System.out.println("*");
		}
		System.out.println("");
 
		}
 
			}
 
}

Did I miss something?

Originally Posted by Dr.UaE

Did I miss something?

What happens when you run it? Is the output correct?

Originally Posted by jps

What happens when you run it? Is the output correct?

just type "System.out.print("*");" in_place_of "System.out.println("*");", and your program will run fine........