Answer Posted / abdur rab

The caller and callee are decoupled.

The caller doesn't know who the callee is; all it knows is
that there is a callee with a certain prototype and
probably some restriction (for instance, the returned value
can be int, but certain values have certain meanings).

This would be useful during the creation of libraries where
in you do not want the logic to be embedded in the library.

hele let us consider a function do_action exists in the
library. It takes three parameters (int, int, and a
function)

The do_action does not know what the passed function does.
#include <stdio.h>

int add ( int x, int y )
{
return ( x + y );
}

int sub ( int x, int y )
{
return ( x - y );
}

int mul ( int x, int y )
{
return ( x * y );
}

int div ( int x, int y )
{
return ( x / y );
}

int do_action ( int x, int y, int (*callback_function)
(int, int) )
{
return ( (*callback_function) ( x, y ) );
}

int main ( int argc, char* argv [] )
{
int x = 10;
int y = 2;

printf ("\nAdd %d", do_action ( x, y, &add ) );
printf ("\nSub %d", do_action ( x, y, &sub ) );
printf ("\nMul %d", do_action ( x, y, &mul ) );
printf ("\nDiv %d", do_action ( x, y, &div ) );

return ( 0 );
}

This is just an example. the usage of callback is more than
this

What is a dynamic array in c?

1102

---

What is a structural principle?

1119

---

what is the structure pointer?

2091

---

Explain bitwise shift operators?

1200

---

Hello. How to write a C program to check and display president party like if i type in the console "biden" and hit enter the output shoud be : "biden is democrat" and if i type "trump" and hit enter the output shoud be: "trump is republican"

2057

---

What are the different types of data structures in c?

1132

---

Apart from dennis ritchie who the other person who contributed in design of c language.

1355

---

Is it better to use a macro or a function?

1119

---

Is c is a high level language?

1151

---

How can a number be converted to a string?

1276

---

Write a program to replace n bits from the position p of the bit representation of an inputted character x with the one's complement. Method invertBit takes 3 parameters x as input character, p as position and n as the number of positions from p. Replace n bits from pth position in 8 bit character x. Then return the characters by inverting the bits.

4183

---

Explain the difference between ++u and u++?

1091

---

Describe the modifier in c?

1075

---

what are the program that using a two dimensional array that list the odd numbers and even numbers separately in a given 10 inputs values

1671

---

A float occupies 4 bytes in memory. How many bits are used to store exponent part? since we can have up to 38 number for exponent so 2 ki power 6 6, 6 bits will be used. If 6 bits are used why do not we have up to 64 numbers in exponent?

2287

---