Add two lines?

Question

assembler

there is a line
res db "Result = ", 0
and there is a calculated number that is translated into a string zn dw
so how can I add the string zn to the res string?

Answer 1

concatenation?
1) allocate memory for a new string of length equal to the sum of the lengths of the first two strings (+ 1)
2) copy the first string to the beginning of the allocated memory
3) copy the second string immediately after the first string in the new buffer
4) do not forget the terminating zero at the end