Compilare: user.cpp:153:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:75: warning: format '%c' expects type 'char*', but argument 2 has type 'int*' user.cpp: In function 'int CMP(const void*, const void*)': user.cpp:63: warning: control reaches end of non-void function user.cpp: In function 'int main()': user.cpp:79: warning: 'cnr' may be used uninitialized in this function