Subversion Repositories programming

/*******************************************************************************

 * proj1.c - implement a simple program that will find the minimum and maximum

 *           numbers out of a randomly generated list of integers, using MPI

 *           to parallelize the operation.

 *

 * Copyright (c) 2006, Ira W. Snyder (devel@irasnyder.com)

 * All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 ******************************************************************************/

#include <stdio.h>

#include <stdlib.h>

#include <limits.h>

#include <unistd.h>

//#include <mpi.h>

int main (int argc, char *argv[])

{

    int i;

    int c = -1;

    int n = -1;

    int min = INT_MAX;

    int max = INT_MIN;

    int *numbers;

    /* Parse the command line options */

    opterr = 0;

    while ((c = getopt (argc, argv, "n:")) != -1)

    {

        switch (c)

        {

            /* Try to get n */

            case 'n':

                n = atoi (optarg);

                break;

            /* Catch bad options */

            case '?':

                if (isprint (optopt))

                    fprintf (stderr, "Unknown option '-%c'.\n", optopt);

                else

                    fprintf (stderr, "Unknown option character '\\x%x'.\n", optopt);

                return 1;

                break;

            default:

                abort ();

        }

    }

    /* Seed the random number generator */

    srand (time(NULL));

    /* Check if the n value is valid */

    if (n<=0)

    {

        fprintf (stderr, "Bad value for n, must be greater than 0\n");

        fprintf (stderr, "Please specify the '-n NUMBER' option\n");

        return 1;

    }

    /* Allocate memory for the random number */

    if ((numbers = (int*) malloc (n * sizeof(int))) == NULL)

    {

        fprintf (stderr, "Memory allocation for array failed, exiting...\n");

        return 2;

    }

    /* Generate random numbers, staying in the range [1,10n] */

    for (i=0; i<n; i++)

        numbers[i] = (rand() % (n*10)) + 1;

    /* Find the max and min of them */

    for (i=0; i<n; i++)

    {

        /* max */

        if (numbers[i] > max)

            max = numbers[i];

        if (numbers[i] < min)

            min = numbers[i];

    }

    /* Print the results */

    printf ("min: %d\n", min);

    printf ("max: %d\n", max);

#ifdef DEBUG

    for (i=0; i<n; i++)

        printf ("numbers[%d] = %d\n", i, numbers[i]);

#endif

    return 0;

}