TongCal calculator is a calculator for programmers that can freely convert and calculate between binary, hexadecimal and decimal. It also allows for various convenient calculations with variable and memory functions.

[Features]
1. You can freely use decimal, binary, and hexadecimal numbers to perform calculations.
2. Supports parentheses to easily perform complex calculations.
3. Supports bit operations, making it convenient for those who need bit operations.
4. You can save up to two result values, so you can use them.
5. Supports two variables (X, Y), so calculations using formulas like functions are possible.
6. You can conveniently check the result value at the same time as input.
7. Hexadecimal and binary numbers automatically determine the bit size based on the size of the number.
8. If the result is negative, the color changes to make it easier to see.

[Operators]
+ : Addition (2.3+3)
- : Subtraction (0xA3-23)
* : Multiplication (6*7)
÷ : Division (36/4)
^ : Square (34^2)
% : Remainder (37%4)
& : AND (0x7D&0b11001100)
| : OR (0b01101000|0xF0)
ⓧ : XOR (89ⓧ0xFF)
≪ : Left Shift (0b01011011≪2)
≫ : Right Shift (0x37≫1)

[Priority]
1 : ^
2 : *, ÷, %
3 : +, -
4 : <<, >>
5 : &
6 : ⓧ
7 : |

[Number display]
1. Hexadecimal and binary numbers are negative if the highest bit is 1, and positive if it is 0.
2. Hexadecimal and binary numbers automatically determine the bit size according to the size of the number.

[Memory Function]
1. When you press the Mem button, the Memory1 value moves to Memory2 and the calculation result is saved in Memory1.
2. When you touch Memory1 or Memory2, the corresponding value is entered.

[Using variables]
1. When you touch the X or Y button to input, the corresponding value will be used instead of X or Y during calculation.