litere.cpp: In function 'int main()': litere.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result litere.cpp:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result litere.cpp:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result litere.cpp:20: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result litere.cpp:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result litere.cpp:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result /tmp/ccmnrGRk.o: In function `main': litere.cpp:(.text+0x72): warning: the `gets' function is dangerous and should not be used.