Translating python dictionary to C++

Question

I have python code that contains the following code.

d = {}

d[(0,0)] = 0
d[(1,2)] = 1
d[(2,1)] = 2
d[(2,3)] = 3
d[(3,2)] = 4

for (i,j) in d:
    print d[(         


        

Answer 1

As a direct answer to your question (for the python part look at my other answer). You can forget the tuple part if you want. You can use any mapping type key/value (hash, etc.) in C++, you just have to find a unique key function. In some cases that can be easy. For instance if you two integers are integers between 1 and 65536 you just could use a 32 bits integer with each 16 bits part one of the keys. A simple shift and an 'or' or + to combine the two values would do the trick and it's very efficient.