compile c++ clang online

 clang++ 

For "2a" val = 2, buffer = a
For "2b" val = 2, buffer = b
For "2c" val = 2, buffer = c
For "2d" val = 2, buffer = d
For "2e" val = 0, buffer = 
For "2f" val = 2, buffer = f
For "2g" val = 2, buffer = g
For "2h" val = 2, buffer = h
For "2i" val = 2, buffer = i
For "2j" val = 2, buffer = j
For "2k" val = 2, buffer = k
For "2l" val = 2, buffer = l
For "2m" val = 2, buffer = m
For "2n" val = 2, buffer = n
For "2o" val = 2, buffer = o
For "2p" val = 2, buffer = p
For "2q" val = 2, buffer = q
For "2r" val = 2, buffer = r
For "2s" val = 2, buffer = s
For "2t" val = 2, buffer = t
For "2u" val = 2, buffer = u
For "2v" val = 2, buffer = v
For "2w" val = 2, buffer = w
For "2x" val = 2, buffer = x
For "2y" val = 2, buffer = y