what are macros?what are its advantages and disadvantages in
c language?
- 2 Answers
- 48644 Views
- I also Faced
- E-Mail Answers
Answer Posted / ravi ranjan
A macro is a name given to a block of C statements as a
pre-processor directive. Being a pre-processor, the block of
code is communicated to the compiler before entering into
the actual coding (main () function). A macro is defined
with the preprocessor directive, #define.
Like::: #define A 10
#define SUM(x,y) ((x) + (y))
Advantages :::
1.Symbolic constants are evaluated by the PRE-processor,
i.e. they are re-written as literal values, not as
variables. this has some nice side-effects that you can do
using symbolic defines eg. macros and functions inside them.
run-time access to symbolic constants should be
significantly faster than access to variables.
opposite to that, variables (and constants) are evaluated by
the processor (compiler).
2. It is easy to modify the value of the constant
variable,since we have to change the value at the macro
defintion only
DisAdvantages:::
1. Macros are not useful when the function definitions are
Big and when the function is used many number of times.
| Is This Answer Correct ? | 52 Yes | 14 No |
Post New Answer View All Answers
am a textile eng. frombut with major of my course including chemical eng, subjects, can i too apply to the co.?
pls i need a help from you friends, is there anybody who can help me out with the question been ask from the USA embassy. i will be going for interview next month pls help me
Hi I am Krushna.I have already applied for PO post in Syndicate Bank.Can anybody send me the sample paper for Syndicate bank PO.
Hi All... PLease send me if anyone have "Information Security Officer" Aptitude papers. Please Mail me at mannusanghi@gmail.com
what are basic step involved in embedded system software development?
wht is difference b/ osi & tcp/ip model
Please. Does someone know how to inicialize tapes in ATL? I need have 100 tapes to init inside the ATL, how is the process to complete this request?
how to find out the name of the users who are currently working starting with the same characters in unix os
I am 2012 pass out b tech student(cse). i have recently started software manual testing class. Is this field is benefitial for me in future?
Whay we use gigabite ethernt
what is advantages and disadvantages of CAT5,CAT5e,CAT6,CAT7,COAXIAL CABLE,FIBER-OPTIC
What is meant by STL?
What is the dewpoint of atmoshperic Air?
WHAT IS DIFFERENT BETWEEN YOU AND OTHER APPLICANT TO GIVE YOU THE JOB
Create an midp application which examines that a phone number which has enters is in the given format * Area code should be one of the following:040,041,050,0400,044
