BOX VOLUME

#include <iostream>
#include<cstdlib>
#include<cmath>
using namespace std;
typedef struct box{
double height;
double width;
double length;
double volume;
}BOX;
double box_volume(BOX box0);
double biggest_volume(BOX box0[], int sizE, double VOLUME);
void display_box(BOX box0);
void create_box(BOX *box0);
int main()
{const int sizE=300;
 BOX boxes [sizE];
for (int i=0;i<sizE;i++){
    create_box(&boxes[i]);
    display_box(boxes[i]);

}
biggest_volume(boxes,sizE,1000);
cout<<"numbers "<<biggest_volume(boxes,sizE,1000);
    return 0;
}
double box_volume(BOX box0){
double volume;
volume= (box0.length,2)*(box0.height)*(box0.width);
return volume;
}
double biggest_volume(BOX box0[], int sizE, double VOLUME){
    double n;
    for (int i=0;i<sizE;i++){
        if (VOLUME<box_volume(box0[i])){
n++   ;     }
    }
    return n;
}
void display_box(BOX box0){
cout<<"box parameters"<<endl;
cout<<"length"<<box0.length<<endl;
cout<<"height"<<box0.height<<endl;
cout<<"width"<<box0.width<<endl;
cout<<"volume"<<box_volume(box0)<<endl;
}
void create_box(BOX *box0){
box0->height=rand()%100+1;//100-1 mm;
box0->length=rand()%100+1;
box0->width=rand()%100+1;
}