Compilare: user.cpp: In function ‘void Read()’: user.cpp:44:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (A + 1); ^ user.cpp:46:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (B + 1); ^ user.cpp:48:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (C + 1); ^ user.cpp: In function ‘int main()’: user.cpp:78:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("base3.in", "r", stdin); ^ user.cpp:79:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("base3.out", "w", stdout); ^ /tmp/cc1vyF8f.o: In function `Read()': user.cpp:(.text+0x43): warning: the `gets' function is dangerous and should not be used.