How do I insert elements of a first vector into another second vector, in a given position given by the user? and also print the step by step

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How do I insert elements of a first vector into another second vector, in a given position given by the user? and also print the step by step

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#1 by (0 votes)

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Entradas - Tam do 1 vetor:5/
Elementos do 1 vetor: 1 2 3 4 5 /
Elementos do 2 vetor: 6 7 8 9 10/
Pos a ser inserida: 1

Saida- 
6 1 7 8 9 10 /
6 2 1 7 8 9 10 /
6 3 2 1 7 8 9 10 /
6 4 3 2 1 7 8 9 10/ 
6 5 4 3 2 1 7 8 9 10

NOTE: The size of the second vector should be twice the size of the first vector, but the second vector will be only half its size.

I'm a bit lost, for now this is my code:

#include <iostream>
using namespace std;

int main(){ 
  int tam1, tam2, pos;
  cin>>tam1;
  int vet1[tam1];
  for(int i=0; i<tam1; i++){
    cin>>vet1[i];
  }
  tam2=tam1*2;
  int  vet2[tam2],vetaux[tam2];
  for(int i=0; i<(tam2/2); i++){
    cin>>vet2[i];
    vetaux[i]=vet2[i];
  }
  cin>>pos;
  for(int i=0; i<tam2; i++){
    vet2[pos]=vet1[i];  
    vet2[pos+1]=vetaux[pos];
    cout<<vet2[i]<<" ";
    pos++;
  }
}

c++ array inserir elementos

asked by anonymous 28.02.2018 / 18:06

1 answer

Custom style for React Fragments hang after inserting data

score 0 · Answer 1

I do not think you can create vectors with a variable, I think only with constants or you need to allocate memory dynamically to the vector. Using new or malloc.

Here is a sample code using vector that will ease the insertion and allocation operation.

#include <iostream>
#include <vector>
using namespace std;
int main(){
    vector<int> vetor1;
    vector<int> vetor2;
    int tam1;
    cout<<"digite o tamanho do vetor 1: ";
    cin>>tam1;
    for(int i=0;i<tam1;i++){
        int aux;
        cout<<endl<<"digite o numero para a posicao "<<i<<" do primeiro vetor: ";
        cin>>aux;
        vetor1.push_back(aux);
    }
    for(int i=0;i<tam1;i++){
        int aux;
        cout<<endl<<"digite o numero para a posicao "<<i<<" do segundo vetor: ";
        cin>>aux;
        vetor2.push_back(aux);
    }
    cout<<"saida"<<endl;
    for(int i=0;i<tam1;i++){
        vetor2.insert(vetor2.begin()+1,vetor1[i]);
        for(int j=0;j<vetor2.size();j++){
            cout<<vetor2[j];
        }
        cout<<endl;
    }
    return 0;
}

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