More Problems

• Write a program to check if a string is a valid IPv4 address.
• Write a program to calculate the length of a string using pointers.
• Write a program to implement a simple countdown timer.
• Write a program to print all perfect numbers in a given range.
• Write a program to find the largest palindrome in a string.
• Write a program to check if two numbers are coprime.
• Write a program to calculate the surface area of a cylinder.
• Write a program to implement a simple text-based calculator with functions.