How to display an index in a array with a function - c

Question

I am trying to display the lowest price index in the array that is found through my function. But I am struggling to figure out how to make it display the specific index. Where do I need to pass the index variable in order to make display the lowest index with my display function?
#define COLOR_SIZE 50
#define PLANT_ARRAY_SIZE 3
struct Plant
{
int plantID;
double price;
char color[COLOR_SIZE];
};
int main()
{
int index;
//create array
struct Plant totalPlants[PLANT_ARRAY_SIZE];
//initialize array
for (int count = 0; count < PLANT_ARRAY_SIZE; count++)
{
initializePlant(totalPlants);
}
// find lowest
index = findCheapestPlant(totalPlants, PLANT_ARRAY_SIZE);
//display lowest cost plant
displayPlant(totalPlants[index]);
return 0;
}
void initializePlant(struct Plant *x)
{
printf("\nEnter the information for the next plant\n");
printf("Enter plant ID as an integer>");
scanf("%d", &(x->plantID));
printf("Enter the plant price as a double>");
scanf("%lf", &(x->price));
printf("Enter the perdominant color of the plant>");
scanf("%s", &(x->color));
void displayPlant(struct Plant *x)
{
printf("\nThe cheapest plant is to be...\n");
printf("Plant ID %d which costs $%.2lf and the color is %s\n", x->plantID, x->price, x->color);
}
int findCheapestPlant(struct Plant x[], int length)
{
double lowest;
int index = -1;
int i = 0;
if (length > 0)
{
lowest = x[i].price;
}
for (i = 0; i < length; i++)
{
if (x[i].price < lowest)
{
index = i;
lowest = x[i].price;
}
}
return index;
}
}
I expect the display function to output the lowest price plant but i get errors.

Answer 1

There are multiple errors addressed in the comments, in addition to fixing these errors, the following should help you achieve what you want to do.
To get the code to display the index as well, maybe change the declaration of displayPlant to take the index as well:
displayPlant(struct Plant *x, int index)
and then pass the index you have in your main to the function like so
displayPlant(totalPlants[index], index);
Then of course you should alter your printf statement to something like:
printf("Plant ID %d (index: %d) which costs $%.2lf and the color is %s\n", x->plantID, index, x->price, x->color);
EDIT: I should also say that initializing your index to -1 is a bad idea, because it will result in seg faults unless your code includes checks for the index being >= 0.
Additionally add this index = i; or index = 0 here in your code:
if (length > 0)
{
lowest = x[i].price;
index = i; //here
}