in c++

Write a function

int mm_score(string k, string g, int &b, int &w)

where k is the secret key g is the guess b is the number of black points (to be set by your function) w is the number of white points (to be set by your function) and returns 1 if the lengths k,g>0 and equal, otherwise returns 0 and b,w are ignored

File you must submit: soln_func.cc

Examples:

k=111 g=111 b=3 w=0

k=abcd g=dcba b=0 w=4

k=abcde g=edcba b=1 w=4

k=xxxyy g=xyzbx b=1 w=2