prog.cpp: In function ‘int main()’:
prog.cpp:20:23: error: invalid conversion from ‘char’ to ‘const char*’ [-fpermissive]
if(temp.compare('0')) input[i][j] = 0;
^
In file included from /usr/include/c++/6/string:52:0,
from /usr/include/c++/6/bits/locale_classes.h:40,
from /usr/include/c++/6/bits/ios_base.h:41,
from /usr/include/c++/6/ios:42,
from /usr/include/c++/6/ostream:38,
from /usr/include/c++/6/iostream:39,
from prog.cpp:1:
/usr/include/c++/6/bits/basic_string.h:2493:7: note: initializing argument 1 of ‘int std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::compare(const _CharT*) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]’
compare(const _CharT* __s) const;
^~~~~~~