flexible length struct array inside another struct using C
- by renz
Hi I am trying to use C to implement a simple struct:
2 boxes, each contains different number of particles; the exact number of particles are passed in main().
I wrote the following code:
typedef struct Particle{
float x;
float y;
float vx;
float vy;
}Particle;
typedef struct Box{
Particle p[];
}Box;
void make_box(Box *box, int number_of_particles);
int main(){
Box b1, b2;
make_box(&b1, 5); //create a box containing 5 particles
make_box(&b2, 10); //create a box containing 10 particles
}
I've tried to implement make_box with the following code
void make_box(struct Box *box, int no_of_particles){
Particle po[no_of_particles];
po[0].x = 1;
po[1].x = 2;
//so on and so forth...
box->p = po;
}
It's always giving me "invalid use of flexible array member". Greatly appreciated if someone can shed some light on this.
