innitialize vector in c++ code example
Example 1: initialize vector of vector c++
#include <iostream>
#include <vector>
#define M 3
#define N 4
int main()
{
// specify default value to fill the vector elements
int default_value = 1;
// first initialize a vector of ints with given default value
std::vector<int> v(N, default_value);
// Use above vector to initialize the two-dimensional vector
std::vector<std::vector<int>> matrix(M, v);
return 0;
}
Example 2: initialize vector c++
// CPP program to create an empty vector
// and push values one by one.
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n = 3;
// Create a vector of size n with
// all values as 10.
vector<int> vect(n, 10);
for (int x : vect)
cout << x << " ";
return 0;
}