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



char** str_split(char* a_str, const char a_delim)
{
    char** result    = 0;
    char* tmp        = a_str;
    char* last_comma = 0;
    char delim[2];
    size_t count = 0;
    delim[0] = a_delim;
    delim[1] = 0;

    /* Count how many elements will be extracted. */
    while (*tmp)
    {
        if (a_delim == *tmp)
        {
            count++;
            last_comma = tmp;
        }
        tmp++;
    }
printf("Count is %d\n",count);

    /* Add space for trailing token. */
    count += last_comma < (a_str + strlen(a_str) - 1);

    /* Add space for terminating null string so caller
       knows where the list of returned strings ends. */
    count++;

    result = malloc(sizeof(char*) * count);

    if (result)
    {
        size_t idx  = 0;
        char* token = strtok(a_str, delim);

        while (token)
        {
            assert(idx < count);
            *(result + idx++) = strdup(token);
            token = strtok(0, delim);
        }
        assert(idx == count - 1);
        *(result + idx) = 0;
    }

    return result;
}

int main()
{
    int i,j;
    int max = 0;
    char str[] = "1,2,3,\\n,4,5,6,\\n,7,8,9,\\n";
    puts(str);
    char ** result = str_split(str,',');
     
    max = sizeof(result);

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

    char * nums[3][4] = {"1","2","3","\n","4","5","6","\n","7","8","9","\n"};
    for (i=0,j=0; i < 3; i++) {
            for (j=0; j < 4; j++) {
               printf("%s",nums[i][j]);
            }
    }
    return 0;
}

1,2,3,\n,4,5,6,\n,7,8,9,\n
Count is 11
Max is 4
1
2
3
\n
123
456
789