print an array

Im working on a probability math problem where I need to print out how many triplets within the array are divisible by 5. my program compiles but I get get an error when I try to run the program. Not sure if my code is correct. I know its a little primative but I'm working with what little knowledge I have of the language. Any ideas why I cant run the program?

Code:

---

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

int array[10] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};

int main()
{
    int a, b, x, i, j;
    int tmp;
    int count = 0;
   
    for(j=0; j<120000; ++j)
    {
        for(x=0; x<50; ++x)
        {
              srand(time(NULL));
              a = (rand() % (array[10] - array[0] + 1) + array[0]);
              b = (rand() % (array[10] - array[0] + 1) + array[0]);
              tmp = a;
              a = b;
              b = tmp;
              i = array[0] + array[1] + array[2];
              if(i%5==0) ++count;
        }
    }
    printf("Count = %d\n", count);
    getchar();
    return 0;
}

---

There is no array[10]. It goes from 0 through 9.


Quzah.

thank you that takes care of my error. now I just need to figure out where I messed up on my shuffling technique because my output is 120000 and should be nowhere near that. This is the first time I use Dev-C++ to generate random numbers.

http://faq.cprogramming.com/cgi-bin/...&id=1043284385
For you use of srand()

Im not sure that is whats wrong I changed a few things that the faq suggests and still get the same output.

Code:

---

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

int array[10] = {1, 2, 2, 3, 3, 3, 4, 4, 4, 4};

int main()
{
    int a, b, x, i, j;
    int tmp;
    int count = 0;
   
    static int Init = 0;
    if(Init == 0)
    {
        srand(time(NULL));
        Init = 1;
    }
   
    for(j=0; j<120000; ++j)
    {
        for(x=0; x<50; ++x)
        {
              a = (rand() % (array[9] - array[0] + 1) + array[0]);
              b = (rand() % (array[9] - array[0] + 1) + array[0]);
              tmp = a;
              a = b;
              b = tmp;
        }
        i = array[0] + array[1] + array[2];
        if(i%5==0) ++count;
    }
    printf("Count = %d\n", count);
    getchar();
    return 0;
}

---

I think I am decaling the max and min wrong. All I want to do is randomly get 2 of the values within my array and have them switch places.

Code:

---

v1 = rand() % number of items in array;
v2 = rand() % number of items in array;

temp = array[ v1 ];
array[ v1 ] = array[ v2 ];
array[ v2 ] = temp;

---

Like that?


Quzah.