Run id: 120476

Main.cc: In function 'int main()':
Main.cc:9:5: error: 'filter' was not declared in this scope
     filter b;
     ^
Main.cc:12:9: error: 'b' was not declared in this scope
         b=6;
         ^
Main.cc:16:9: error: 'b' was not declared in this scope
         b=6+(a-2)*0.5;
         ^
Main.cc:19:9: error: 'b' was not declared in this scope
         b=6+(10-2)*1.8+(a-10)*1.8*1.5;
         ^
Main.cc:21:11: error: 'b' was not declared in this scope
     cout<