Question

What does this: struct packed_struct

{
unsigned int :3;
unsigned int f1:1;
unsigned int f2:1;
unsigned int f3:1;
unsigned int type:8;
unsigned int index:18;
}; do?

Answer 1

The given code defines a structure called packed_struct used to store data. The structure includes unsigned integers and bit fields with specific bit field widths.

Step-by-step explanation:

The given code is defining a structure called packed_struct. This structure is used to store data and represents a collection of variables. Each variable in the structure has a specific size and type. The structure includes variables such as unsigned integers and bit fields.

The colon followed by the numbers represents the bit field width. It specifies the number of bits that each field can occupy in the structure. For example, unsigned int :3 suggests that this particular field will occupy 3 bits in the structure.