strfry - randomize a string
#define _GNU_SOURCE /* See feature_test_macros(7) */
char *strfry(char *string);
The strfry() function randomizes the contents of string by using rand(3) to randomly swap characters in the string. The result is an anagram of string.
The strfry() functions returns a pointer to the randomized string.
The strfry() function is unique to the GNU C Library.
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