Compilare: user.cpp: In function 'int main()': user.cpp:66: warning: format '%c' expects type 'char*', but argument 3 has type 'char (*)[1]' user.cpp:68: warning: format '%c' expects type 'char*', but argument 3 has type 'char (*)[1]' user.cpp:71: warning: format '%c' expects type 'char*', but argument 3 has type 'char (*)[1]' user.cpp:97: warning: format '%d' expects type 'int', but argument 3 has type 'long int'