/in/foo.cc: In function 'int main()':
/in/foo.cc:13:32: error: too few arguments to function 'void exit(int)'
   if(money<0) {cout<<0-i; exit();}
                                ^
In file included from /usr/include/c++/6/cstdlib:75:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:47,
                 from /in/foo.cc:1:
/usr/include/stdlib.h:504:13: note: declared here
 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
             ^~~~