How to Implement Operator+= for Custom String Class?

[linag96]

I have a my_string.cpp and .h file. I am required to append string q to char c and append char c to string q
these are the following functions:

my_string my_string::operator+=(const my_string& q)
my_string my_string::operator+=(char c)

Private member functions:

int capacity;
int size;
char *ptr;

Please help on writing the 2 operator functions

 

[Future Bruno]

My_string& My_string:perator+=(const my_string& q) { if (capacity < (size + q.size)) { capacity = size + q.size; char* newptr = new char[capacity]; for (int i = 0; i < size; i++) newptr = ptr; delete[] ptr; ptr = newptr; } for (int i = 0; i < q.size; i++) { ptr[size + i] = q.ptr; } size += q.size; return *this;}My_string& My_string:perator+=(char c) { if (capacity < (size + 1)) { capacity = size + 1; char* newptr = new char[capacity]; for (int i = 0; i < size; i++) newptr = ptr; delete[] ptr; ptr = newptr; } ptr[size] = c; size++; return *this;}