Question

Using c++,

1: Create a vector of 20 randomly generated integers, then

2. Create a new vector that will only store the even numbers from the original vector.

3. Display the original vector and the vector of even integers to the console.

Answer 1

#include <iostream>
#include <string>
#include <ctime>
#include <stdio.h>
#include <stdlib.h>
#include <vector>

using namespace std;

int main()
{
   srand((unsigned)time(NULL));
   vector<int> vec1;
   vector<int> vec2;

   // Generating original vector of 20 random numbers between 1 and 100
   for(int i = 0;i<20;i++)
   {
      // Pushing each random number generated to vec1
      vec1.push_back(1+rand()%1000);
   }

   cout<<"Content of the original vector:"<<endl;
   // Looping throgh each value in the first vector
   for(int i = 0;i<20;i++)
   {
      // Printing value to console
      cout<<vec1[i]<<" ";
   }
   // Printing new line
   cout<<endl;

   // Looping through each value in the original vector
   for(int i = 0;i<vec1.size();i++)
   {
      // If the value at index i is even
      if(vec1[i]%2==0)
      {
         // Pusing this value to second vector
         vec2.push_back(vec1[i]);
        }
   }

   cout<<"\nContent of the vector of even integers:"<<endl;
   // Looping throgh each value in the second vector
   for(int i = 0;i<vec2.size();i++)
   {
      // Printing value to console
      cout<<vec2[i]<<" ";
   }
   // Printing new line
   cout<<endl;

   return 0;
}