More Problems

• Write a program to check if a string contains only alphanumeric characters.
• Write a program to find the greatest common divisor (GCD) using recursion.
• Write a program to implement a simple online feedback form.
• Write a program to calculate the area of a rectangle given its length and width.
• Write a program to check if a string is a valid hexadecimal number.
• Write a program to find the longest consecutive sequence of integers in an array.
• Write a program to implement a basic online quiz application with scoring.
• Write a program to check if a number is an even perfect number.