Main.cc:2:1: error: ‘sing’ does not name a type; did you mean ‘sinl’? sing namespace std; ^~~~ sinl Main.cc: In function ‘int main()’: Main.cc:5:21: error: expected primary-expression before ‘%’ token scanf("%lf %lf",%d,%h); ^ Main.cc:5:24: error: expected primary-expression before ‘%’ token scanf("%lf %lf",%d,%h); ^