C++ Programming/Code/Standard C Library/Functions/strxfrm
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#include <cstring> size_t strxfrm( char *str1, const char *str2, size_t num );
The strxfrm() function manipulates the first num characters of str2 and stores them in str1. The result is such that if a strcoll() is performed on str1 and the old str2, you will get the same result as with a strcmp().