typedef struct Mesh{

	float x; //x-coord of Vertex
	float y; //y-coord of Vertex
	float z; //z-coord of Vertex
	
} typeMesh

main
{

	typeMesh COORDS [SIZE TO BE ALLOCATED] //This is where I'd like to allocate this dynamically.

      /* What I would like to obtain is the COORDS array to be of SIZE_n that will be obtained as the output of another function that will be called only later in the code.


;

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

typedef struct {

	float x; //x-coord of Vertex
	float y; //y-coord of Vertex
	float z; //z-coord of Vertex
	
} Mesh;

int later_function () {
	int size;
	printf("How big? ");
	scanf("%d",&size);
	return size;
}

int main() {
	int x,i;
	Mesh *ray;
	x=later_function();
	ray=malloc(sizeof(Mesh)*x);
	for (i=0;i<x;i++) {
		ray[i].x=(float)i;
		ray[i].y=(float)x-i;
		ray[i].z=(float)(x-i)*0.5;
		printf("Vertex %f %f %f\n",ray[i].x,ray[i].y,ray[i].z); 
	}
	free(ray);
	return 0;
}

	ray[i].z=(float)(x-i)*0.5f;