#include <cstring>
#include <cstdlib>
#include <iostream>
int main()
{
char source[] = "123456789";
char dest[] = "---------";
memmove (&dest[3], &source[5], 4);
std::cout << "Источник = " << source << std::endl;
std::cout << "Приемник = " << dest << std::endl;
return EXIT_SUCCESS;
}