#include <iostream>
#include <string.h>
// cstring memcpy,strcpy,strncpy
#include <stdio.h >// cstdio size_t
#include <stdlib.h>//cstdlib malloc

using namespace std;
// string_copy_strnspn1.cpp
int main()
{
	
	  size_t length;
	  //size_t copy ( char* s, size_t n, size_t pos = 0) const;
	  char buffer1[20], buffer2[20];
	  char *buffer3,*buffer4;
	  cout<<"\n copying from string to character array "<<endl; 
	  string str ("Test string...");
	  length=str.copy(buffer1,11,0);
	  buffer1[length]='\0';
	  exit(1); 
	  cout << "buffer1 contains: " << buffer1 << "\n";
	   // character to charcter 
	  memcpy(buffer2, buffer1, sizeof(buffer1)); 
	  cout<<"\nbuffer2 :"<< buffer2 << " size :" << sizeof(buffer2); 
	  //
	      buffer3 = new char [str.size()+1];
	  	  strcpy (buffer3, str.c_str());
	  	  cout<< "\n"<<buffer3;
	  	  //
	  	buffer4= new char [str.size()+1];
	  		  	  strncpy (buffer4, buffer3,7 );
	  		  	  cout<< "\n"<<buffer4;
	  
	  
	  
	 return 0;
}