Compilare: user.cpp: In function ‘int main()’: user.cpp:50: warning: left-hand operand of comma has no effect user.cpp:50: warning: right-hand operand of comma has no effect user.cpp:72: warning: left-hand operand of comma has no effect user.cpp:72: warning: right-hand operand of comma has no effect user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result