Why am I not allowed to assign a result of function returning const char* to char*, bt a string literal(constant) can be assigned to char*? [duplicate]

Question

Function returning a const char * cannot be assigned to char*

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const char* func() {
    return "This is a const string two ";
}

but char* is assigned a constant string in main directly:

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int main() {
    char *d =" this is a const string one"; // works fine
    char *e = func();   // error cannot convert from 'const char *' to 'char *'
    return 1;
}

Why the contradiction?

Answer 1

Assigning a string literal to char* is inherited from C, where this has been allowed since long before C had a const keyword.

In later C++ standards, this has been deprecated. A modern compiler ought to warn you about that.