dezbateri.cpp: In function 'int main()': dezbateri.cpp:67: warning: comparison between signed and unsigned integer expressions dezbateri.cpp:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dezbateri.cpp:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dezbateri.cpp:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result dezbateri.cpp:20: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result dezbateri.cpp:16: warning: 'sign' may be used uninitialized in this function /tmp/cc0ySHd0.o: In function `main': dezbateri.cpp:(.text+0x2ea): warning: the `gets' function is dangerous and should not be used.