More Problems

• Write a program to find the longest common substring between two strings.
• Write a program to implement a simple file backup system.
• Write a program to convert a string to a float.
• Write a program to check if a number is a Smith number.
• Write a program to find the intersection of two linked lists.
• Write a program to calculate the area of a circle given its radius.
• Write a program to check if a string is a valid credit card number.
• Write a program to implement a basic to-do list application using file I/O.