Concepts Used in Above Programs

C Data Types: char, int
Typecasting in C: Explicitly converting char to int
Input/Output Functions: scanf(), printf(), getchar(), putchar()
Pointers in C: Declaring pointers, using & to assign addresses, and * to dereference
C Arrays: Declaring character arrays
String in C: Storing strings
Functions in C: Creating and using custom functions (e.g., get_ascii())
Loops in C: Using for loops to iterate through characters in a string
Conditional Statements in C: Using if to validate input (optional in some variations)
ASCII Encoding: Understanding how characters are represented as integer value.