Main.cc: In function 'int main()': Main.cc:7:13: error: redeclaration of 'int s' int n,x,s,g,s,b,q; ^ Main.cc:7:9: note: 'int s' previously declared here int n,x,s,g,s,b,q; ^ Main.cc:13:7: error: expected primary-expression before '/' token q=/1000; ^