Compilare: user.cpp: In function ‘int main()’: user.cpp:14:9: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n, ch=0; ^ user.cpp:11:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "paritate.in", "r", stdin ); ^ user.cpp:12:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "paritate.out", "w", stdout ); ^ user.cpp:16:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/cc4GB3Zp.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.