Which of the statements in the following code segment will result in a compilation/syntax error?

char a[] = 'this', b[] = 'this'; // Line 1
while (*a != '\0' && *b != '\0') { // Line 2
if (*a != *b) // Line 3
printf('Not same'); // Line 4
++a; // Line 5
++b; // Line 6
}
if (*a == '\0' && *b == '\0') // Line 7
printf('Same'); // Line 8