Eroare de compilare: user.cpp: In function 'void back(long int, long int)': user.cpp:32: error: ISO C++ forbids comparison between pointer and integer user.cpp: In function 'int main()': user.cpp:42: warning: format '%d' expects type 'int*', but argument 2 has type 'long int*' user.cpp:42: warning: format '%d' expects type 'int*', but argument 3 has type 'long int*' user.cpp:42: warning: format '%d' expects type 'int*', but argument 4 has type 'long int*' user.cpp:78: warning: format '%d' expects type 'int*', but argument 2 has type 'long int*' user.cpp:91: warning: array subscript has type 'char' user.cpp:97: warning: array subscript has type 'char' user.cpp:102: warning: format '%d' expects type 'int', but argument 2 has type 'long long int'