Main.cc: In function 'int main()': Main.cc:6:5: error: expected ',' or ';' before 'for' for(double i=100;i<=10;i++){ ^ Main.cc:6:23: warning: statement has no effect [-Wunused-value] for(double i=100;i<=10;i++){ ^ Main.cc:6:31: error: expected ';' before ')' token for(double i=100;i<=10;i++){ ^