Random numbers in C aren't random

Here's the code for my program. it's supposed to get two numbers from user then generate random numbers using rand function. but when I compile it, the numbers are not random.

I also wrote this in java, and that one works perfectly.

C version:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int cmpfunc();

int main()
{
   puts("How many numbers do you want to generate?");
   int n;
   scanf("%d", &n);
   int numbers[n];

   puts("What should be the largest number possible?");
   int m, i;
   scanf("%d", &m);
   int result[m];

   for(i=0;i<m;i++)
       numbers[i] = i + 1;

   for(i=0;i<n;i++)
   {
       srand(time(NULL));
       int r = rand() % m;

       result[i] = numbers[r];
       numbers[r] = numbers[m - 1];
       m--;

   }

   qsort(result, n, sizeof(int), cmpfunc); //sorting the result array

   for(i=0;i<n;i++)
   {
       printf("%d\n", result[i]);
   }

    getch();
    return 0;
}

int cmpfunc (const void * a, const void * b)
{
   return ( *(int*)a - *(int*)b );
}

Java version:

import java.util.*;

public class RandomNumberGenerator {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        System.out.println("How many numbers do you want to generate?");
        int n = in.nextInt();

        System.out.println("What should be the largest number possible?");
        int m = in.nextInt();

        int numbers[] = new int[m];
        for(int i=0;i<numbers.length;i++)
            numbers[i] = i + 1;

        int result[] = new int[n];
        for(int i=0;i<result.length;i++)
        {
            // make a random index between 0 and n - 1
            int r = (int) (Math.random() * m );

            result[i] = numbers[r];
            // move the last element into the random location
            numbers[r] = numbers[m - 1];
            m--;
        }

        System.out.println("Do you want the result to be sorted? (1 for Yes, others for No)");
        int ans = in.nextInt();

        if(ans==1)
            Arrays.sort(result);

          System.out.println("Result:");
          for (int r : result)
             System.out.println(r);

          pressAnyKeyToContinue();

    }

    private static void pressAnyKeyToContinue()
     { 
            System.out.println("Press Enter to continue.");
            try
            {
                System.in.read();
            }  
            catch(Exception e)
            {}
     }

}