[c++] 배열 초기화

1D vector

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    vector<int> v(10); // 처음 초기화 할 때는 vector<int> v(10, 123); 이런식으로 가능
    fill_n(v.begin(), 10, 123);
    cout << v[0] << endl;
    cout << v[9] << endl;
 
    return 0;
}cs

2D vector

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    vector v(10, vector<int>(20)); // 처음 초기화 할 때는 vector v(10, vector<int>(20, 123)); 이런식으로 가능
    fill_n(v.begin(), 10, vector<int>(20, 123));
    cout << v[0][0] << endl;
    cout << v[9][19] << endl;
 
    return 0;
}cs

1D array

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    int edge[10];
    fill_n(edge, size(edge), 123);
    cout << edge[0] << endl;
    cout << edge[9] << endl;
 
    return 0;
}cs

2D array

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    int edge[10][20];
    fill_n(edge[0], 10*20, 123);
    cout << edge[0][0] << endl;
    cout << edge[9][19] << endl;
 
    return 0;
}cs