momente.cpp: In function 'int main()': momente.cpp:109: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result momente.cpp:110: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result momente.cpp:112: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result momente.cpp:116: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccY8RYmj.o: In function `main': momente.cpp:(.text+0x25f): warning: the `gets' function is dangerous and should not be used.