The macro parameters are not enclosed in parentheses, so macro substitution produces sqrt(a+2*a+2 + b+3*b+3). By operator precedence, multiplication is evaluated before addition. The expression simplifies to sqrt(3*a + 4*b + 5). Therefore, option D is correct. A safer macro would parenthesize each parameter occurrence.
Programming in C MCQ - Pre-processor Directives
The presentation identifies # as the delimiter associated with preprocessor directives. Directives such as #include begin with this hash symbol.
#include is the preprocessor directive used to include the contents or declarations made available through a header file.
#include is a preprocessor directive. It is processed before normal compilation and is not a C variable, data type, or function.
The presentation associates the hash (#) symbol with preprocessing. It appears at the beginning of directives such as #include.
