exam02

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+Assignment name  : inter
+Expected files   : inter.c
+Allowed functions: write
+--------------------------------------------------------------------------------
+
+Write a program that takes two strings and displays, without doubles, the
+characters that appear in both strings, in the order they appear in the first
+one.
+
+The display will be followed by a \n.
+
+If the number of arguments is not 2, the program displays \n.
+
+Examples:
+
+$>./inter "padinton" "paqefwtdjetyiytjneytjoeyjnejeyj" | cat -e
+padinto$
+$>./inter ddf6vewg64f gtwthgdwthdwfteewhrtag6h4ffdhsd | cat -e
+df6ewg4$
+$>./inter "nothing" "This sentence hides nothing" | cat -e
+nothig$
+$>./inter | cat -e
+$