sighting in your gun at 100 yards

I need a program written in c++ edition 9. I need the program to be around 350 lines or more. I need the computer to ask what brand of gun you have. the program will give these choices. (Mossberg, Ruger, Savage Arms, Winchester, Rimington, Marlin, Beretta, Browning, Benelli, Smith & Wesson) After you enter what brand of gun you have the computer will then ask what caliber gun you have and it will give these choices ( 30-06, 243, 300, 308, 223, 7mm) after selecting the caliber gun you have it will then ask for the brand of scope you have giving these choices ( Nikon, Leupold, Steiner, Zeiss, Bushnell, Trijicon) after selecting the scope you have it will then ask what size cartridge you are using giving these choices ( 100 gr., 125 gr., 150 gr., 165 gr., 180 gr.) after you selected what cartridge you have. the computer will out put what you need to set your scope to, for it to be sighted in. for example the computer will say ( up one inch, right 1/2 inch) the program can tell you to go from 4 inches to the left - 4 inches to the right and can tell you 4 inches up - 4 inches down not to exceed 4 inches in either direction. but the program must give one up/down reading and one right/left reading when outputting a scope calculation. I also need the source code with the program.