sh-3.2$ gcc ex.c -o ex
ex.c:1:3: error: invalid preprocessing directive #Author
ex.c:2:3: error: invalid preprocessing directive #Version
ex.c:3:3: error: invalid preprocessing directive #Tested
ex.c:4:3: error: invalid preprocessing directive #Greetz
ex.c:5:3: error: invalid preprocessing directive #Code
ex.c: In function 'main':
ex.c:199: error: 'PAGE_SIZE' undeclared (first use in this function)
ex.c:199: error: (Each undeclared identifier is reported only once
ex.c:199: error: for each function it appears in.)