Compilare: user.cpp: In function ‘short int val_cel(short int, short int)’: user.cpp:25: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:105: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:106: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:108: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:116: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘short int val_cel(short int, short int)’: user.cpp:14: warning: ‘ciff’ may be used uninitialized in this function user.cpp:14: warning: ‘ciff2’ may be used uninitialized in this function