Question

int A(const char* name){     
    name = "Here you GO!";    
    char* new_name;      
    //strcpy(new_name,name);      
    new_name = const_cast<char *>(name);      
    printf("%s\n", new_name);      
    return 0;    
}

This is the source code which I am testing.

one problem is when I use const_cast<char *>, it says it is undeclared. (I know it can work under ‘g++’ compiling)
Anther problem is when I try to use strcpy to combine them together, it pops up segmentation fault.
the premise is I have to use gcc whatevername.c -std=c99 to compile.

Is anyone offer some suggestion how to solve that. Much appreciate..

Answer 1

You need to allocate space for the new string. You were on the right track using strcpy, because const_cast is C++ only. Edit: Even better use strdupas Miroslav suggests.

int A(const char* name)
{ 
    name = "Here you GO!";
    char* new_name = malloc(strlen(name)+1);
    if (new_name) {
        strcpy(new_name,name);
        printf("%s\n", new_name);
    }
    return 0;
]