Compilare: user.cpp: In function ‘void Citire()’: user.cpp:19: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int semn(char)’: user.cpp:31: warning: control reaches end of non-void function user.cpp: In function ‘int calculeaza(int&)’: user.cpp:47: warning: ‘x’ may be used uninitialized in this function