Compilare: user.cpp: In function ‘int main()’: user.cpp:8: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:13: warning: ‘Sbun’ may be used uninitialized in this function user.cpp:13: warning: ‘l1’ may be used uninitialized in this function user.cpp:13: warning: ‘c1’ may be used uninitialized in this function user.cpp:13: warning: ‘c2’ may be used uninitialized in this function user.cpp:13: warning: ‘l2’ may be used uninitialized in this function user.cpp:13: warning: ‘Sfreq21’ may be used uninitialized in this function user.cpp:13: warning: ‘Sfreq22’ may be used uninitialized in this function