42. Register Type Aliases

In embedded systems, hardware registers have fixed widths such as 8-bit, 16-bit, or 32-bit.
To improve code readability and safety, firmware often uses type aliases to represent these register sizes.

Your task is to define register-sized type aliases using modern C++ and demonstrate how fixed-width registers behave when storing values that exceed their capacity.

Step 1 — Create type aliases

Create three type aliases using the using keyword:

• Reg8 → alias for uint8_t
• Reg16 → alias for uint16_t
• Reg32 → alias for uint32_t

These represent 8-bit, 16-bit, and 32-bit hardware registers.

Step 2 — Read input values

The program receives three unsigned integer values from input:

raw8 raw16 raw32

Example:

255 12345 987654321

Store these values in variables of the corresponding register alias types:

• raw8 → Reg8
• raw16 → Reg16
• raw32 → Reg32

If a value exceeds the capacity of the target type, allow natural overflow behavior (as occurs in real hardware registers).

Step 3 — Print output

Print the stored register values using the exact format:

R8=<value> R16=<value> R32=<value>

All values must be printed as unsigned integers, not characters.

Example 1

Input:

255 12345 987654321

Output:

R8=255 R16=12345 R32=987654321 

Example 2 (Overflow behavior)

Input:

300 70000 5

Output:

R8=44 R16=4464 R32=5 

Explanation:

• 300 stored in an 8-bit register overflows to 44
• 70000 stored in a 16-bit register overflows to 4464

Constraints

• You must use using (do not use typedef)
• Do not clamp or prevent overflow
• Only print the stored register values
• Output format must match exactly