Compilare: user.cpp: In function ‘void citire()’: user.cpp:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void DF(int)’: user.cpp:33: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void euler()’: user.cpp:64: warning: comparison between signed and unsigned integer expressions