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sprintf - C++ Reference

但今天要介紹的是

g_sprintf 以及 g_strdup_printf


g_sprintf ()
gint g_sprintf(gchar *string, gchar const *format, ...);


An implementation of the standard sprintf() function which supports positional parameters, as specified in the Single Unix Specification.

g_strdup_printf ()
gchar* g_strdup_printf (const gchar *format ...);


Similar to the standard C sprintf() function but safer, since it calculates the maximum space required and allocates memory to hold the result. The returned string should be freed when no longer needed.