telecomanda.cpp: In function 'int main()': telecomanda.cpp:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result telecomanda.cpp:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result telecomanda.cpp:36: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result telecomanda.cpp:37: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccGK9L2P.o: In function `main': telecomanda.cpp:(.text+0xe6): warning: the `gets' function is dangerous and should not be used.