prog.cpp: In function 'int main()':
prog.cpp:10:12: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
printf(a[0]);
^
In file included from /usr/include/c++/5/cstdio:42:0,
from /usr/include/c++/5/ext/string_conversions.h:43,
from /usr/include/c++/5/bits/basic_string.h:5247,
from /usr/include/c++/5/string:52,
from /usr/include/c++/5/bits/locale_classes.h:40,
from /usr/include/c++/5/bits/ios_base.h:41,
from /usr/include/c++/5/ios:42,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iostream:39,
from prog.cpp:1:
/usr/include/stdio.h:362:12: note: initializing argument 1 of 'int printf(const char*, ...)'
extern int printf (const char *__restrict __format, ...);
^