Compilare: user.cpp: In function ‘int flux()’: user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp:45: warning: unused variable ‘fiu’ user.cpp: In function ‘int main()’: user.cpp:137: warning: comparison between signed and unsigned integer expressions user.cpp:99: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:100: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:102: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:111: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result