Compilare: user.cpp: In function 'int main()': user.cpp:13: warning: format '%c' expects type 'char*', but argument 2 has type 'int*' user.cpp:16: warning: format '%c' expects type 'char*', but argument 2 has type 'int*' user.cpp:28: warning: format '%c' expects type 'char*', but argument 2 has type 'int*' user.cpp:7: warning: 'p' may be used uninitialized in this function