Main.cc: In function ‘int main()’:
Main.cc:15:19: error: expected ‘)’ before ‘mod’
if (j mod 4==0) dem++;
^~~
Main.cc:17:22: error: expected ‘)’ before ‘mod’
if(j mod 7==0) dem++;
^~~
Main.cc:19:26: error: expected ‘)’ before ‘mod’
if(j mod 11==0) dem++;
^~~