Main.cc: In function ‘int main()’: Main.cc:4:2: error: ‘DOUBLE’ was not declared in this scope DOUBLE h,h1,s=0; ^~~~~~ Main.cc:5:7: error: ‘h1’ was not declared in this scope cin>>h1; ^~ Main.cc:5:7: note: suggested alternative: ‘y1’ cin>>h1; ^~ y1 Main.cc:6:2: error: ‘h’ was not declared in this scope h=h1; ^ Main.cc:8:3: error: ‘s’ was not declared in this scope s+=2*h; ^ Main.cc:11:23: error: ‘s’ was not declared in this scope printf("%.3f %.3f\n",s-h1,h); ^