/in/foo.cc: In function 'int main()':
/in/foo.cc:10:3: error: expected '(' before 'n'
   n%i==100;
   ^
/in/foo.cc:12:2: error: 'else' without a previous 'if'
  else
  ^~~~
/in/foo.cc:7:8: warning: unused variable 'i' [-Wunused-variable]
  int n,i=100;
        ^