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Madison Byrne
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Asked: 2022-05-21T18:29:48+00:00 In:

How to initialize vector in c?

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How to initialize vector in c? Can you give me some suggestions?

♦ Suggestions of ITtutoria Team
In this tutorial, you’ll learn how to initialize a vector in c.

Here is our case study:

//me
typedef vector<int> vi; 
​
vi a; a.push_back(10);       //init empty vector then fill
vi b(10,0);          //init vector with 10 0's
vi c {1,2,3};         //init vector like array
int l[] = {1,2,3}; vi d(l,l+ 3);    //init vector with array
vi d1{10,20,30}; vi d2(d1.begin(), d2.end()); //init vector with another
vi e(10); fill(e.begin(), e.end(), 0);   //init vector then fill with 0's
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1 Answer

  1. // 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;
}
​
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