What are bit fields? How to use bit fields in structure declaration?
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We know that variables in C can be bool, integer, char, long and so on. The minimum space is required for character or a bool which requires 1 byte. While the character requires all bits in a byte, bool requires only 1 bit and the remaining 7-bits in bool are stuffed and of no use which meant memory is wasted. C programming has also a way to use a memory efficiently in such scenarios. This is possible while declaring a structure.
For example, let us see the below structure declaration.
struct
{
int rollno;
}student;
The above structure occupies more space than below structure.
struct
{
int rollno:1;
}student;
Advantages of bit fields are:
- Easy to implement
- Saves memory
The same has been explained in the below video:
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