The symbols used in C language are all on the keyboard, which can be entered directly or by shift plus a key.

Shift plus number keys, from 1 to 0! @#$%^&； *()

In the upper left corner, shift plus 1 the key to the left is the bitwise negation operator ~

Shift plus \ above carriage return is a bitwise OR operator |

Shift with comma and period are two angle brackets.

That's all.