Main.cc: In function ‘int mian()’:
Main.cc:8:9: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations]
gets(c);
^
In file included from /usr/include/stdio.h:862:0,
from /usr/include/c++/7/cstdio:42,
from /usr/include/c++/7/ext/string_conversions.h:43,
from /usr/include/c++/7/bits/basic_string.h:6361,
from /usr/include/c++/7/string:52,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:232:1: note: declared here
gets (char *__str)
^~~~
Main.cc:6:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d*c",&n);
~~~~~^~~~~~~~~~~
Main.cc:8:7: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result]
gets(c);
~~~~^~~
/tmp/ccmkrX1X.o: In function `mian()':
Main.cc:(.text+0x69): warning: the `gets' function is dangerous and should not be used.
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status