Diagnostic Quiz

Problems

6. Pointer Usage

Remember the pointer type match we have discussed in the lecture. See Type Match.

• A pointer to <type> can only store the address of the variable with the same <type>

• You cannot assign double to a long variable, this will generate compilation error!

13. Memory Leak

1. free a "heap-object" pointer twice will cause undefined behavior or memory error

2. after freeing a "heap-object" pointer, if you access the address pointed to by the pointer, you will get memory error.

15. Valid String Declaration

In C, only the characters enclosed by "" will be considered as a valid string.

// Valid
char *s = "I am the real C string."

// Invalid
char *s = """
I am a C string.
"""
char *s = 'I am a string too!'
char s[] = { 's', 't', 'r', 'i', 'n', 'g' };