Some types and macros defined under the header file stddef.h may be defined under other header files too.

A. strlen() B. strlength() C. stringlen() D. strsize()

A. To print formatted text to the standard output B. To read text from the standard input C. To open a file D. To close a file

A. math.h B. stdlib.h C. cmath.h D. algorithm.h

A. Compares two strings and returns an integer indicating their relationship B. Copies one string to another C. Concatenates two strings D. Searches for a substring