Thread: More trouble passing arrays

Hi,

I have been trying to get my head around arrays, though i understood it but have tripped over again with multidimensional arrays.

Code:

int main(int argc, char *argv[])
{
   
   int num_roads = argc - 1;        /* to change by 1 later !!!!!! */
   /* To create an integer array from the input char array */
   int i;
   int road_type[num_roads];
   for(i = 0; i < num_roads; i++)
   {
      road_type[i] = atoi(argv[i+1]);
   }
   /* -----------------end road type thing-------------------*/
   
   int num_routes = get_num_routes(num_roads, road_type);
   printf("Number of possible routes is %d\n", num_routes);
   
   /* Create an integer array showing possible routes i.e. road 1 to road 4 would be 14 */
   int j;
   int route_list[num_routes][2];
   for(j = 0; j < num_routes; j++)
   {
      route_list[j][0] = get_route_list(num_roads, num_routes, road_type, j, 0);
      printf("%d", route_list[j][0]);
      route_list[j][1] = get_route_list(num_roads, num_routes, road_type, j, 1);
      printf("%d\n", route_list[j][1]);
   }
   /* -----------------end route list thing-------------------*/
   
   route_check(num_roads, num_routes, road_type, route_list);
   return 0;
}




/* Create an array showing 1 for routes that can not occur simultaneously */
int route_check(int num_roads, int num_routes, int *road_type, int route_list[][1])
{
   int i, j, k;
   int from = 9;
   int to = 9;
   int route_holder[] = {0,0};
   int route_clear1;
   int route_clear2;
   int side1[num_roads];
   int side2[num_roads];
   int invalid_routes[num_routes][num_routes]; /* write function to clear this. Stores 1 for invalid route */
   for(i = 0; i < num_routes; i++)
   {
      from = route_list[i][0];
      to = route_list[i][1];
      for(j = 0; j < num_routes; j++)
      {
         for (k = 0; k < num_routes; k++)
         {
            get_side1(side1, num_roads, road_type, from, to);
            get_side2(side2, num_roads, road_type, from, to);
            if(route_list[j][0] == side1[k])
            {
               route_holder[0] = j;
               route_clear1++;
            }
            if(route_list[j][1] == side1[k])
            {
               route_holder[1] = j;
               route_clear1++;
            }
            if(route_list[j][1] == side2[k])
            {
               route_holder[1] = j;
               route_clear2++;
            }
            if(route_list[j][1] == side2[k])
            {
               route_holder[1] = j;
               route_clear2++;
            }
         }
      }   
   }
   return 0;//*invalid_routes;
}


/* Function to get a list of of the roads on either side of a particular route. */
void get_side1(int *side1, int num_roads, int *road_type, int from, int to)
{
   int i = from;
   int place_holder = 0;
   while(i != to)
   {
      if(i != num_roads - 1)
      {
         side1[place_holder] = i;
         place_holder++;
      }
      else if(i == num_roads - 1)
      {
         side1[place_holder] = i;
         place_holder++;
         i = 0;
      }
      i++;
   }
   if (road_type[from] == 2)
   {
      side1[place_holder] = from;
      place_holder++;
   }
   side1[place_holder] = 9;
}
      

  
/* Function to get a list of of the roads on either side of a particular route. */
void get_side2(int *side2, int num_roads, int *road_type, int from, int to)
{
   int i = from;
   int place_holder = 0;
   while(i != to)
   {
      if(i != num_roads - 1)
      {
         side2[place_holder] = i;
         place_holder++;
      }
      else if(i == 0)
      {
         side2[place_holder] = i;
         place_holder++;
         i = num_roads - 1;
      }
      i--;
   }
   if (road_type[to] == 2)
   {
      side2[place_holder] = to;
      place_holder++;
   }
   side2[place_holder] = 9;
}

I have cut out most of the code from the program, sorry there is still so much to read i am not sure what parts are involved in the error.

The error is...
in main: passing arg 4 of 'route_check' from incompatible pointer type.

and before i managed to create that error i got....
error subscripted value is neither array nor pointer
for the parts in the route_check fuction where i used route_list[j][1] or route_list[j][0]

I haven't finished writing route_check yet, that why it don't make much/any sence. Was just trying to iron out any errors at this stage.


Any help on these errors would be great.

Thanks again,
-Nick

You are passing route_list to route_check() and route_list is declared as:

Code:

int route_list[num_routes][2];

However, route_check() takes the type:

Code:

int route_list[][1]

These are not interchangeable.

*sigh* it is always a stupid mistake. Thanks a lot for your help.

-Nick