string literals into a "dynamic array"

[EwCjE3v7]

Write a program to concatenate two string literals, putting the result in a dynamically allocated array of char.

char *name = new char[11]("Header " "Test");

array 'new' cannot have initialization arguments

Same problem even if I were to take the "Test" away, I still get the same error, how would I assign or initialize a "dynamic array" from a string literal?

[fg109]

Maybe something like this?

#include <iostream>

char* concatenate(const char *str1, const char *str2)
{
    char *ret;
    unsigned int len1 = 0;
    unsigned int len2 = 0;
    unsigned int len3;
    
    while (*(str1 + len1) != '\0')
        ++len1;
    while (*(str2 + len2) != '\0')
        ++len2;
    
    len3 = len1 + len2 + 1;
    ret = new char[len3];
    for (unsigned int i = 0; i < len3; ++i)
    {
        if (i < len1)
            ret[i] = str1[i];
        else if (i < len1 + len2)
            ret[i] = str2[i - len1];
        else
            ret[i] = '\0';
    }
    return ret;
}

int main()
{
    char *str = concatenate("Hello,", " World!");
    std::cout << str;
    delete[] str;
    return 0;
}

[EwCjE3v7]

Thank you mate, cheers!