More Problems

• Write a program to check if a string is a valid hexadecimal number.
• Write a program to find the most frequently occurring character in a string.
• Write a program to implement a basic calculator with functions for addition and subtraction.
• Write a program to convert a string to an integer without using built-in functions.
• Write a program to check if a number is a sociable number.
• Write a program to find the total number of consonants in a string.
• Write a program to implement a basic personal finance tracker.
• Write a program to calculate the surface area of a cone.