Results for “Structures & function interfaces”
Small, practical examples. Search by task or narrow things down below.
Group related values in nested structures
C: Nested members model a record that owns another simple record.
C✓ Tested
Keep function state between calls
C: A static local variable retains its stored value for the lifetime of the process.
C✓ Tested
Pass a function as a callback
C: A typed function pointer permits behavior to be supplied to another function.
C✓ Tested
Give a reusable record type a short name
C: A typedef names a structure type without changing its representation.
C✓ Tested
Initialize structure fields by name
C: Designated initializers make field assignments independent of their declaration order.
C✓ Tested
Iterate over a fixed array of records
C: Compute the array element count with sizeof at the point where it is still an array.
C✓ Tested
Keep caller data unchanged by passing a structure by value
C: A value parameter is a copy of the original structure.
C✓ Tested
Represent a small set of named states
C: An enum gives symbolic names to integer state values.
C✓ Tested
Return a status separately from a calculated result
C: An output pointer lets a function return success or failure independently of its numeric result.
C✓ Tested
Track which union member is currently valid
C: An explicit tag tells callers which overlaid union value to read.
C✓ Tested
Accept different types with a generic function
Accept different types with a generic function in a complete Rust program using the standard library.
Rust✓ Tested
Cache repeated pure function calls
Python: Use lru_cache to avoid recomputing results for identical hashable arguments.
Python✓ Tested