assignment.c

/* do not add other includes */
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>

double getTime() {
    struct timeval t;
    double sec, msec;

    while (gettimeofday(&t, NULL) != 0);
    sec = t.tv_sec;
    msec = t.tv_usec;

    sec = sec + msec / 1000000.0;

    return sec;
}

/* for task 1 only */
void usage(void) {
    fprintf(stderr, "Usage: cachetest1/2 [--repetitions M] [--array_size N]\n");
    exit(1);
}

int main(int argc, char *argv[]) {
    double t1, t2;

    /* variables for task 1 */
    unsigned int M = 1000;
    unsigned int N = 256 * 1024;
    unsigned int i;

    /* declare variables; examples, adjust for task */
    //int *a;
    double a[100];


    /* parameter parsing task 1 */
    for (i = 1; i < (unsigned) argc; i++) {
        if (strcmp(argv[i], "--repetitions") == 0) {
            i++;
            if (i < argc)
                sscanf(argv[i], "%u", &M);
            else
                usage();
        } else if (strcmp(argv[i], "--array_size") == 0) {
            i++;
            if (i < argc)
                sscanf(argv[i], "%u", &N);
            else
                usage();
        } else usage();
    }


    /* allocate memory for arrays; examples, adjust for task */
    //a = malloc (N * sizeof(int));

    /* initialise arrray elements */


    t1 = getTime();
    /* code to be measured goes here */
    /***************************************/




    /***************************************/
    t2 = getTime();

    /* output; examples, adjust for task */
    printf("time: %6.2f secs\n", (t2 - t1));

    /* IMPORTANT: also print the result of the code, e.g. the sum,
     * otherwise compiler might optimise away the code */

    /* free memory; examples, adjust for task */
    //free(a);

    return 0;
}