elements from one array to another

[lost110]

Hello guys! I am a bit confused! Can we transfer elements so that array 'a' has total elements 4,9,7,6,5,3,12,14,3,2 ..so total 10 elements! but then we need a size of 10 in 'a'..so how we will make that program?

#include<iostream>
using namespace std;
int main()
{  
   int a[5]= {4,9,7,6,5};
   int b[5]= {3,12,14,3,2};
   for (int i=0;i<5;i++)
   {
   	 a[i] = b[i];
   	 cout  << a[i];
   }
}

[keskiverto]

The size of array is set when writing the code; it cannot change.

std::vector can resize:

#include <iostream>
#include <vector>

int main()
{  
   std::vector<int> a {4,9,7,6,5};
   std::vector<int> b {3,12,14,3,2};
   a.reserve( a.size() + b.size() );
   for ( auto x : b )
   {
   	 a.push_back( x );
   }

   for ( auto x : a )
   {
   	 std::cout << ' ' << x;
   }
}

You can create a larger array, but use only some of it:

#include <iostream>

int main()
{  
   int a[14] {4,9,7,6,5};

   for ( auto x : a )
   {
   	 std::cout << ' ' << x;
   }
}

[lost110]

Thanks mate!