4.25.md

~'q' << 6 is the same as (~'q') << 6.

1. The operand of ~ operator is a "small integer"(char here), thus its value is first promoted to a larger integral type(int here).

   'q' = 01110001 promoted to 00000000 00000000 00000000 01110001

2. After the ~ operator evaluated,

   ~'q' 11111111 11111111 11111111 10001110

3. Left shift,

   ~'q' << 6 11111111 11111111 11100011 10000000

4. The result is -7296.