Compilare: user.cpp: In function ‘int main()’: user.cpp:121: warning: format ‘%lf’ expects type ‘double*’, but argument 2 has type ‘long double*’ user.cpp:121: warning: format ‘%lf’ expects type ‘double*’, but argument 3 has type ‘long double*’ user.cpp:143: warning: comparison between signed and unsigned integer expressions user.cpp:114: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:115: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:118: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:121: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result