CPP

C++ String Copy Example

#include <iostream>  
#include <cstring>  
using namespace std;  
int main()  
{  
    char key[25], buffer[25];  
    cout << "Enter the key string: ";  
    cin.getline(key, 25);  
    strcpy(buffer, key);  
    cout << "Key = "<< key << endl;  
    cout << "Buffer = "<< buffer<<endl;  
    return 0;  
}

copy c++ stl

#include <bits/stdc++.h>
using namespace std;
int main()
{
    vector<int> v1 ={1,2,3,4,7,6,6,8,9};
    vector<int> v2 ={10,11,12,13,14,15};
    copy(v1.begin(),v1.begin()+3,v2.begin()+2);
    for(auto i:v2)
    {
        cout<<i<<" ";
    }
    return 0;
}

string copy in cpp

//use '=' to copy string
string s1={"Hello"};
string s2;
s2=s1;	//now s2 will have a copu s1

c++ copy string

#include <iostream>
#include <string.h>

/*
std::copy(void *, void *, void *)
1st arg: source begin
2nd arg: source end
3rd arg: destination address
*/

int main() 
{
	char *mystring{new char[20]{}};
	
	strcat(mystring, "Its Grepper");
	
    char *deststring{new char[20]{}};
    
    strcat(deststring, "Hello ");
    
    std::copy(mystring + 4, mystring + 12, deststring + strlen(deststring));
    
    std::cout << deststring << std::endl;
    
    
    
    delete[] mystring;
    delete[] deststring;
  
  /*
  output : Hello Grepper
  */
}