need some help from someone who knows C (real basic stuff)

[BeefEater]

I know at least some of you guys are really into programing. My freind has this program for class. He found the code on the internet and wants to just submit it, but he wants to change it alittle so it doesnt look so plagerized (switch variables and stuff like that) and add comments. The problem is he cant really write C and it has been so long since I have that I dont want to screw it up. If someone more competant than I has a few minutes to fix up this code I would appreciate it. In case your worried about the legality of this all, the code was provided free of an copyright, so the only infringement would be his honor code violation. Thanks in advance, Dave.
**********************************************************

#include
#include
#include
#include
#include
#define MAX 10

struct link
{
int freq;
char ch[MAX];
struct link* right;
struct link* left;
};
typedef struct link node;


void sort(node *[], int);
node* create(char[], int);
void sright(node *[], int);
void Assign_Code(node*, int [], int);
void Delete_Tree(node *);




main()
{
node* ptr;
int i, n, total = 0, u, c[15];
char str[MAX];
node* a[12];
int freq;


printf( "Huffman Algorithm\n");
printf( "Copyright (C) 2003 Pradeep P Chandiramani -PCD-\n" );
printf( "Huffman Algorithm comes with ABSOLUTELY NO WARRANTY;\n");
printf( "This is free software, and you are welcome\n" );
printf( "to redistribute it under GNU GENERAL PUBLIC LICENSE\n" );
printf( "For details read gpl.txt included with installation.\n\n" );

printf( "Press any Key to continue..." );
getch();

printf("\nEnter the number of of variables:");/*input the no. of letters*/
scanf("%d", &n);

for (i = 0; i < n; i++)
{
printf("Enter the variable & probability");/*input the letter & frequency*/
scanf("%s %d", str, &freq);

a = create(str, freq);
}



while (n > 1)
{
sort(a, n);
u = a[0]->freq + a[1]->freq;
strcpy(str,a[0]->ch);
strcat(str,a[1]->ch);
ptr = create(str, u);
ptr->right = a[1];
ptr->left = a[0];
a[0] = ptr;
sright(a, n);
n--;

}
Assign_Code(a[0], c, 0);
getch();




}


node* create(char a[], int x)
{
node* ptr;
ptr = (node *) malloc(sizeof(node));
ptr->freq = x;
strcpy( ptr->ch , a);
ptr->right = ptr->left = NULL;
return(ptr);
}


void sort(node* a[], int n)
{
int i, j;
node* temp;

for (i = 0; i < n - 1; i++)
for (j = i; j < n; j++)
if (a->freq > a[j]->freq)
{
temp = a;
a = a[j];
a[j] = temp;
}
}



void sright(node* a[], int n)
{
int i;
for (i = 1; i < n - 1; i++)
a = a[i + 1];
}


void Assign_Code(node* tree, int c[], int n)
{
int i;
if ((tree->left == NULL) && (tree->right == NULL))
{
printf("%s code:", tree->ch);

for (i = 0; i < n; i++)
{
printf("%d", c);
}
printf("\n");
}
else
{
c[n] = 1;
n++;
Assign_Code(tree->left, c, n);
c[n - 1] = 0;
Assign_Code(tree->right, c, n);
}
}


void Delete_Tree(node * root)
{
if(root!=NULL)
{
Delete_Tree(root->left);
Delete_Tree(root->right);
free(root);
}
}
/* END of NON Graphical Routines*/


/* Start of Graphical Routines*/

[BeefEater]

disreguard...took care of it