Compilare: user.cpp: In function ‘void DF(int)’: user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void DFT(int)’: user.cpp:37: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void parc(int, int)’: user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:85: warning: comparison between signed and unsigned integer expressions user.cpp:95: warning: comparison between signed and unsigned integer expressions user.cpp:156: warning: comparison between signed and unsigned integer expressions user.cpp:58: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:59: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:61: 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