Compilare: user.cpp: In function ‘void sol_rad1(int)’: user.cpp:18: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void sol_final(int, int)’: user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:55: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:60: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result