Cstring - Inserting element

[makan007]

How can I create a separate function to add a character (prompt user to enter a character) to my ElementA & display the result?
I will have to make use of cstring function...

#include <iostream>
#include <ctime>
#include <cstring>
#include <cstdlib>
using namespace std;

const int MAX = 10; 


void displaySet1 (char*, int);


int main ()
{

	char x[MAX];
	char* a = x;

	srand (time(NULL));
	
	cout << "Element A: ";
	displaySet1 (a, 10);
	
	cout << endl;
	cout << "Enter a ASCILL letter: " << endl;
        cout << "Final Array: ";
}

//Construct Element A
void displaySet1 (char* a, int size)
{
	
	size = rand () % 9 + 2;
	
	cout << "{";
	
	for (int i = 0; i < size; i++)
	{
		a[i] = static_cast <char> (rand () % 26 + 70);
		
				
		cout << a [i];
		
		if (i < size - 1)
		cout << ",";
		
	}
	
	
	cout << "}";
}

	

[hamsterman]

To insert a char into a cstring you have to create a new cstring:

char input[10];
char output[11];
memcpy(output, input, 3);
output[3] = 'X';
memcpy(output + 4, input + 3, 7);

[makan007]

What does memcpy, input, output does?

[R0mai]

http://www.cplusplus.com/reference/clibrary/cstring/memcpy/