Question

I was about to initialize a char array inside a class as

class a{
    char a[25];
};

a::a(){
    a[] = {'a','b','c'};
}

but gives compile time error.

Answer 1

If your compiler supports the C++11 feature, you can do it like this:

a::a() :arr({'a','b','c'})
{}

Otherwise, you’ll have to do it manually, or you can use a function like memcpy:

a::a() {
    memcpy(arr,"abc",3);
    // The other initialization method will fill the rest in with 0,
    // I don't know if that's important, but:
    std::fill(arr + 3, arr + 25, '\0');
}

Or, as suggested by ephemient:

a::a() {
    strncpy(arr, "abc", 25);
}