reteta.cpp: In function 'int main()': reteta.cpp:46: warning: comparison between signed and unsigned integer expressions reteta.cpp:164: warning: comparison between signed and unsigned integer expressions reteta.cpp:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result reteta.cpp:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result reteta.cpp:12: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/cctG7ZQ0.o: In function `main': reteta.cpp:(.text+0x5b): warning: the `gets' function is dangerous and should not be used.