Compilare: user.cpp: In function 'int shunting_yard(char*, int*)': user.cpp:120: warning: array subscript has type 'char' user.cpp:122: warning: array subscript has type 'char' user.cpp:122: warning: array subscript has type 'char' user.cpp:124: warning: array subscript has type 'char' user.cpp:125: warning: array subscript has type 'char' user.cpp:127: warning: array subscript has type 'char' user.cpp:132: warning: array subscript has type 'char' user.cpp:136: warning: array subscript has type 'char' user.cpp:139: warning: array subscript has type 'char' user.cpp:143: warning: array subscript has type 'char' user.cpp:147: warning: array subscript has type 'char' user.cpp:149: warning: array subscript has type 'char' user.cpp:149: warning: array subscript has type 'char' user.cpp:151: warning: array subscript has type 'char' user.cpp:152: warning: array subscript has type 'char' user.cpp:154: warning: array subscript has type 'char' user.cpp:159: warning: array subscript has type 'char' user.cpp:163: warning: array subscript has type 'char' user.cpp:171: warning: array subscript has type 'char' user.cpp:173: warning: array subscript has type 'char' user.cpp:173: warning: array subscript has type 'char' user.cpp:175: warning: array subscript has type 'char' user.cpp:176: warning: array subscript has type 'char' user.cpp:178: warning: array subscript has type 'char' user.cpp:183: warning: array subscript has type 'char' user.cpp:187: warning: array subscript has type 'char' user.cpp:195: warning: array subscript has type 'char' user.cpp:212: warning: array subscript has type 'char' user.cpp:212: warning: array subscript has type 'char' user.cpp:214: warning: array subscript has type 'char' user.cpp:215: warning: array subscript has type 'char' user.cpp:217: warning: array subscript has type 'char' user.cpp:222: warning: array subscript has type 'char' user.cpp:226: warning: array subscript has type 'char' /tmp/ccht5X67.o: In function `main': user.cpp:(.text+0x86f): warning: the `gets' function is dangerous and should not be used.