scadere.cpp: In function 'int main()': scadere.cpp:17: warning: unused variable 'x' scadere.cpp:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scadere.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scadere.cpp:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result scadere.cpp:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result scadere.cpp:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result scadere.cpp:76: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccPcqwWK.o: In function `main': scadere.cpp:(.text+0xb0): warning: the `gets' function is dangerous and should not be used.