bilete.cpp: In function 'int main()': bilete.cpp:15: warning: unused variable 'st1' bilete.cpp:7: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result bilete.cpp:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result bilete.cpp:12: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccHjZUwQ.o: In function `main': bilete.cpp:(.text+0x22c): warning: the `gets' function is dangerous and should not be used.