Some languages provide a way to create a value of a structured type \"on the fly

Question

Some languages provide a way to create a value of a structured type "on the fly, " without first storing it in a variable. In Ada, for example, an array or record value can be created by using an aggregate. In an Ada aggregate, either positional or named notation can be used, with mixing of the two allowed. What is the name of this feature in C99? For what types is this feature supported in C99? Does C99 allow the use of positional notation? If so, give an example for each supported type Does C99 allow the use of named notation? If so, give an example for each supported type. Does C99 allow the use of both positional and named notation? If so, give an example for each supported type.

Explanation / Answer

a.) Designated Initializers

b.) Supported features are Structures, Unions & Arrays

c.) It allows the use of positional notation. We can represent a number in three bases as decimal(base 10), octal(base 8) or hexadecimal(base 16). So, a number 42 can be represented as 42 in base 10, 052 in base 8, and 0x2a in hexadecimal. [[ to represent in base 8, we prefix 0 ]] [[ to represent in base 16, we prefix 0X or Ox ]]

d.) C doesn't support named parameters.

e.) No C99 does not allow both positional and named notation. It only allows positional notation.

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