How to use the assign function In C++

It accepts two arguments, starting pointer and ending pointer, and converts the char pointer array into a string.

C++

// C++ Program to demonstrate the conversion
// of char* to string using assign function
#include <iostream>
using namespace std;
 
int main()
{
    const char* ch = "Welcome to w3wiki";
    string str;
   
    // 24 is the size of ch
    str.assign(ch, ch + 24);
    cout << str;
    return 0;
}

Output

Welcome to w3wiki

Time complexity: O(N), as time complexity of assign() is O(N) where N is the size of the new string
Auxiliary space: O(1).

Convert char* to string in C++

There are three ways to convert char* into string in C++.

Using the “=” operator
Using the string constructor
Using the assign function

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