Which type of structure we used

Question

typedef struct {
int h;
int w;
int l;
} box;
int main() {
box boxes[3] = {{2, 6, 8}, {4, 6, 6}, {2, 6, 9}};

Answer 1

What is your doubt?

Something like this?
#include <iostream>
using namespace std;

typedef struct {
int h;
int w;
int l;
} box;

int main() {
box boxes[3] = {{2, 6, 8}, {4, 6, 6}, {2, 6, 9}};
for(int i = 0; i < 3; i++){
cout << "Box " << (i+1) << endl;
cout << "height: " << boxes[i].h<< endl;
cout << " width: " << boxes[i].w<< endl;
cout << "length: " << boxes[i].l<< endl;
cout << endl;
}
return 0;
}

Answer 2

Yup