Answer / dwight schrute

suppose u have 2 files:

file1 has following functions:
A1
B1
C1

file12 has following functions:
A2
B2
C2

scenario:
A1 needs to use A2 in turn A2 needs to use B1.
A1 invokes A2;
A2 invokes B1;

for B1 to be available in file2 either shld be extern or in
header file which in turn exposes it to entire file2.
In order to minimize this exposure "pass B1 as a functional
pointer to A2".

Answer / chikani sagar

TO implement call back functions......It is more efficient.
code complexity will be redused.....

Answer / sanjeeva rao

It is useful when you want to send function as argument to
another function. And to implement the call back functions in multi-threading programming.

Answer / tahir ali

As you probably learned in your first programming courses,
pointers to variables allows you to modify variable contents
from a non-local environment. This gives the flexibility of
writing generic functions which do not alter "known" global
variables, but references to "unknown" variables. Such
functions can be reused. Function pointers gives you the
same flexibility, but at a higher level. Instead of calling
a "known" function, one can call any arbitrary "unknown"
function. This is the main advantage of function pointers:
greater flexibility and better code reuse.

Answer / sudeep reddy

function pointers can be used to replace switch/if
statements,to realize late binding(virtual function tables)
or to implement callback function primitives.

Answer / rajesh

code complexcity is less

main(){char *str;scanf("%s",str);printf("%s",str); }The error in the above program is: a) Variable 'str' is not initialised b) Format control for a string is not %s c) Parameter to scanf is passed by value. It should be an address d) none

0 Answers  

Do pointers take up memory?

0 Answers  

What is the explanation for the dangling pointer in c?

0 Answers  

24.what is a void pointer? 25.why arithmetic operation can’t be performed on a void pointer? 26.differentiate between const char *a; char *const a; and char const *a; 27.compare array with pointer? 28.what is a NULL pointer? 29.what does ‘segmentation violation’ mean? 30.what does ‘Bus Error’ mean? 31.Define function pointers? 32.How do you initialize function pointers? Give an example? 33.where can function pointers be used?

0 Answers  

What is the size of array float a(10)?

0 Answers  

void main() { int x=25,y=32; clrscr(); x=x++ + y++; y=++x + ++y; printf("%d%d",x,y); }

5 Answers  

Find the O/p of the following 1) #include int main() { char c='1'; int j=atoi(c); }

4 Answers   Subex,

why we wont use '&' sing in aceesing the string using scanf

0 Answers   HCL,

Struct(s) { int a; long b; } Union (u) {int a; long b; } Print sizeof(s)and sizeof(u) if sizeof(int)=4 and sizeof(long)=4

2 Answers   Mascot,

Explain #pragma in C.

1 Answers  

Why do we use main function?

0 Answers  

What is the difference between variable declaration and variable definition in c?

0 Answers