39. Function Pointer Dispatch Table

You are building a simple math command handler. You are given two integers and a command code:

• 0 → Add
• 1 → Subtract
• 2 → Multiply
• 3 → Divide (integer division, assume non-zero)

Your task:

• Create an array of function pointers, each pointing to one of the above operations.
• Based on the command code, use the function pointer to invoke the correct operation.
• Return the result.
   

❌ No if-else or switch-case
✅ Must use a function pointer array
 

Example-1

Input: a = 10, b = 5, command = 0
Output: 15

Example-2

Input: a = 20, b = 8, command = 1
Output: 12

Example-3

Input: a = 6, b = 3, command = 3
Output: 2