Add two lengths
Get two lengths in feet and inches and add them
struct length l1,l2,l3;
printf("Enter First Length:");
printf("Enter second Length:");
l1,l2 and l3 are structure varibles, each occupies 8btyes. 4 bytes for feet and 4bytes for feet.
Add inches of l1 and l2 and store it in l3, then add feets of l1 and l2 and store it in l3.
if l3 inches is greater than 11 then increment l3 feet by and decrement l3 inch by 12.