C++ noob question

Question

Hi, I am new to codding, and trying to learn step by step. Can someone please tell me why is the bellow code wrong? It is supposed to store some weights and distances

#include <iostream>

using namespace std;

int main()
{
int i, n, g,d, m, s, p;
cout<<"nr destinatii= "; cin>>n;
for (i=0; i<n; i++)
{
cout<<"greutate= ";cin>>g[i];
cout<<"distanta= ";cin>>d[i];
}

return 0;
}

Answer 1

Variable g and d were not declared as arrays. Instead do:

int n;
cin >> n;

// dynamically allocate n blocks of memory of type int to g and d
int* g = new int[n];
int* d = new int[n];

for (int i = 0; i < n; i++) {
cin >> g[i] >> d[i];
}

// more stuff here

// free your dynamically allocated memory
delete [] g;
delete [] d;

Answer 2

nevermind, i think i got it.
int i, n, m, s, p;
double g,d;
cout<<"nr destinatii= "; cin>>n;

for (i=0; i<n; i++)
{
cout<<"greutate= ";cin>>g;
cout<<"distanta= ";cin>>d;
s=s+g*d;
p=p+d;

Answer 3

U need arrays

Answer 4

#include <iostream>

using namespace std;

int main()
{
int i, n,m, s, p;
cout<<"nr destinatii= "; cin>>n;
int d[n],g[n];
for (i=0; i<n; i++)
{
cout<<"greutate= ";cin>>g[i];
cout<<"distanta= ";cin>>d[i];
}
//The calculation goes here

return 0;
}
It's quite fine for basic coding.

Answer 5

but g and d are integers, i need g to store the weights and d the distances
I want to store n distances and n weights, and then calculate the weighted average to weight