5
Necessarily need the library #include<vector.h>
To raise it
vector <int> c;
Question: How to store values in it and read them?
3 answers
8
For these things it is always interesting to consult the quasi-official documentation and then ask more specific questions than you didn’t understand with a real example of what you’re doing.
One of the many ways would be:
vector <int> c { 1, 2, 3 }; //inicializa
c.push_back(4); //adiciona
cout << c[2]; //pega o elemento
I put in the Github for future reference.
Searches and other operations are done on general algorithms for any data collection.
5
As described in the documentation http://www.cplusplus.com/reference/vector/vector/
to put values inside the vector you must use push_back(value) and to take a value you can use the operator [] or the at function.
vector <int> c;
c.push_back(3);
c.push_back(4);
int a = c[0] // a recebe o valor 3
int b = c.at(1) // b recebe o valor 4
-
1
The site cplusplus.com is not considered a good reference. http://stackoverflow.com/questions/6520052/whats-wrong-with-cplusplus-com
3
It’s not very secret, you use push_back to add values, then you can catch them using Dice or an iterator.
Example:
#include <iostream>
#include <vector>
using namespace std;
int main(){
vector<int> vetor;
int i;
// INSERINDO 5 VALORES DE 1 A 5 USANDO PUSH_BACK
for(i = 0; i < 5; i++){
vetor.push_back(i);
}
// PEGANDO O TAMANHO DO VETOR
cout << "Tamanho do Vetor = " << vetor.size() << endl;
// ACESSANDO OS 5 VALORES DO VETOR PASSANDO PELO INDEX
for(i = 0; i < 5; i++){
cout << "Valor do vetor [" << i << "] = " << vetor[i] << endl;
}
// OU USANDO O ITERATOR PARA ACESSAR OS VALORES.
vector<int>::iterator v = vetor.begin();
while( v != vetor.end()) {
cout << "Valor do vetor = " << *v << endl;
v++;
}
return 0;
}
See working on https://ideone.com/LllvB0
Browser other questions tagged c++ vector
You are not signed in. Login or sign up in order to post.
I don’t know much about the language, but take a look here: https://pt.wikibooks.org/wiki/Programar_em_C%2B%2B/Vectors
– Guilherme Lima
Please do not take this comment lightly, but when someone who is still learning how to use an X resource starts a question with "I necessarily need X", I see a beautiful start of dogma there. Beware, okay? Vectors have their utilities, but they’re not the only and/or best data structure for any and all situations.
– Luiz Vieira