More Problems

• Write a program to implement a simple file copy application.
• Write a program to check if a string contains only digits.
• Write a program to find the total number of vowels in a string using a function.
• Write a program to calculate the power of a number using recursion.
• Write a program to find the first index of a character in a string.
• Write a program to implement a basic online bookstore application.
• Write a program to check if a number is a narcissistic number.
• Write a program to find the maximum length of a substring without repeating characters.