What Am I Doing Wrong In This C Program Need Help Asap

I need C programming help asap! (Problem #5)?

This semester is my first programming class (and probably last) and I am really struggling to complete this last project. I honestly have no idea how to even start on this.

The assignment is in C (not C++)and is actually due tonight, but I can turn it in for late credit, so something is better than nothing, but again, I don't even know where to start.

If someone could solve this and post it for me as an example I would be incredibly grateful. I promise that I'm not going to directly copy it, but having an example that I can learn from has always been my most efficient way to learn, so I that's how I would use it.

Here's the problem:

5. (15 pts) Write a recursive function called sum_primes() that accepts an unsigned integer, n, as an argument, and returns the sum of all primes from 2 to n. You must use recursion to solve this problem!


Please help, I'm desperate!

Thanks in advance!

-Spencer

Can someone help with a Programming (C#) question?

Write a method that accepts and displays two parameters: a string name of a movie and an integer running time in minutes. Provide a default value for the minutes so that if you call the method without an integer argument, minutes is set to 90. Write a console based program with a Main() method that proves you can call the movie method with only a string argument as well as with a string and an integer.

I have been trying to figure this out all afternoon. I can't get in touch with my teacher for help, so I am turning to the minds of YA! Only serious answers please, if you can't help then don't post.

Right triangle program in C?

Depending on how much information you want to give, you may need just an 'if', maybe an 'if-else', and possibly an 'else-if' as well.

Assuming you can do the "read input" part yourself, you'll need something like this for the rest of it:

unsigned a,b,c,a2,b2,c2;

/* read input .... */

/* compute squares */
a2 = a*a;
b2 = b*b;
c2 = c*c:

if (c2 == (a2 + b2)) {
puts("is right triangle, hypotenuse = c");
} else if (b2 == (a2 + c2)) {
puts("is right triangle, hypotenuse = b");
} else if (a2 == (b2 + c2)) {
puts("is right triangle, hypotenuse = a");
} else {
puts("not right triangle");
}

If you only wanted to check if a,b,c can be sides of a right triangle, you could do this:

printf("\n%u, %u, %u are ",a,b,c);
if (!((c2 == (a2 + b2)) ||
(b2 == (a2 + c2)) ||
(a2 == (b2 + c2)))) {
printf("not ");
}
printf("the sides of a right triangle\n");

Direct3D problems, help please?

So I want to play the Mortal Kombat Komplete Edition to PC, but I have encountered a problem.
When i try to start the game from a shortcut it says: "Missing file blabla, "binkw32.dll", but that is fixed if I try to open the game from the folder. But then another problem occurs.

When I open the game from the folder it says:"This game requires Direct3D 9.0c on Windows Vista and above."

I am using Windows 8 and I cannot download this version because it says: "Direct3D 9.0c is only compatible under windows vista" (something similar).

Is there anyway to fix this problem? Please help ASAP :D

JAVA HELP! Car Class. new InsuredCar?

WHAT AM I DOING WRONG?

Suppose you want to create a new InsuredCar class that is derived from the Car class. It adds one new boolean attribute, insured. Here is a constructor call for the class:

InsuredCar c = new InsuredCar("Ford", 15.0, 4.0, true);

Using super appropriately, write the constructor for the InsuredCar class. (Hint: model your solution after the constructor for the UsedCar class).

So far I have..

public class InsuredCar extends Car{

private boolean insured;
public InsuredCar(String whatMake, double cap, double amt, boolean ins){
super(whatMake,cap,amt);
insured = insured;
}
public boolean getInsured(){
return insured;
}
public void setInsured(boolean isInsured){
insured = isInsured;
}
}

BUT IT TELLS ME THIS ISN'T CORRECT. SOMEONE HELP!

Linked Lists Method Question (need help) [code provided]?

Hey guys, below is a piece of code. Underneath that is what I am trying to accomplish with my code, but am confused on what to do. Can someone please help?

public class PlayerLinkedList extends ShellLinkedList
{

public PlayerLinkedList( )
{
super( );
}

public void insert( Player p )
{
// insert as head
PlayerNode pn = new PlayerNode( new Player( p ) );
pn.setNext( head );
head = pn;
numberOfItems++;
}

public Player delete( int searchID )
throws DataStructureException
{
PlayerNode current = head;
PlayerNode previous = null;
while ( current != null
&& current.getPlayer( ).getID( ) != searchID )
{
previous = current;
current = current.getNext( );
}

if ( current == null ) // not found
throw new DataStructureException( searchID
+ " not found: cannot be deleted" );
else
{
if ( current == head )
head = head.getNext( ); // delete head
else
previous.setNext( current.getNext( ) );

numberOfItems--;
return current.getPlayer( );
}
}


public Player peek( int searchID )
throws DataStructureException
{
PlayerNode current = head;
while ( current != null
&& current.getPlayer( ).getID( ) != searchID )
{
current = current.getNext( );
}

if ( current == null ) // not found
throw new DataStructureException( searchID
+ " not found: cannot be deleted" );
else
{
return current.getPlayer( );
}
}
}

I want to include one more method that inserts a new player in the third position of the list. Head would be the first position. If the list is empty, the method will insert the new player as the head of the list.

Can anyone please help me with this? I would really appreciate it.