proc1.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>

struct point {

     
    double x, y;
    };

    /* A vector is an array of points. N is the number of points, and p points to the first point in the array.
    */
    struct vector {
    int n;
    struct point *p;
    };

    /* A binary tree of vectors, ordered by KEY. */
    struct tree {
    struct tree *left, *right;
    int key;
    struct vector *vector;
    };

    /* Return the node in TREE whose key is KEY. Return zero if there if no such node. */
    struct tree *
    find (struct tree *tree, int key)
    {
    if (! tree)
    return 0;

    if (key < tree->key)
    return find (tree->left, key);
    else if (key > tree->key)
    return find (tree->right, key);
    else
    return tree;
    }

int main (int argc, char **argv)
{
	struct sigaction new_action, old_action;