Programming - Ch 17 Exercise Solutions

Modified March 24, 2009.

• Exercise 1: What is the output format of pointer values on your implementation? Hint: Don't read the documentation.

  Solution code.

• Exercise 2: How many bytes are there in an int? In a double? In a bool? Do not use sizeof except to verify your answer.

  Solution code.

• Exercise 3: Write a function, void to_lower(char* s), that replaces all upper case characters in the C-style string s with their lower case equivalent. For example "Hello, World!" becomes "hello, world!" Do not use any standard library functions. A C-style string is a zero-terminated array of characters, so that if you find a char with the value 0 you are at the end.

  Solution code.

• Exercise 4: Write a function, char* strdup(const char*), that copies a C-style string into memory it allocates on the free store. Do not use any standard library functions.

  Solution code.