More Problems

• Write a program to find the number of uppercase and lowercase letters in a string.
• Write a program to check if a string is a valid identifier according to C rules.
• Write a program to find the first occurrence of a substring in a string.
• Write a program to calculate the average of grades entered by the user.
• Write a program to implement a simple stopwatch using time functions.
• Write a program to find the total number of characters in a string excluding spaces.
• Write a program to implement a simple address book.
• Write a program to find the largest and smallest element in a list of integers.