(Not in the ANSI standard)
#include <sdgstd.h> s2 = strsave(s1); s2 = _strsave(s1);
"strsave" allocates memory (via "malloc") and creates a copy of the string "s1". If the memory request is denied, the program is aborted.
"_strsave" works exactly like "strsave". It is included as a "safe" name that can be used, even if programs define their own versions of "strsave" (without the underscore).
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