PROBLEM 1-concatenation.c 2-stack.c 3-prefix.c 4-postfix.c 5- simple queue.c 6-circular queue.c 7-priority queue.c 8-linklist.c 9-linkstack.c 10-linkqueue.c 11-binary tree.c 12-binary-array.c 13-binary-copy.c 14-CONVersions.CPP 15-A_CLOCK.CPP 16-SOUNDS.CPP 17- ARROW.C 18- BIGGER.C 19- decimal2Roman.C 20- FACT.C 21- FACTorial.C 22- number 2 english.C 23- SORting an array.C 24- MOUSE.CPP 25- HANOI2.CPP 26-AVL_Tree.cpp 27-b_tree.cpp 28-ball.cpp 29-BANK.CPP 30-bouncingball.cpp 31-brick game.cpp 32-FACEOF.CPP 33-GRAPHIC1.CPP 34-Graphics BGIDEMO.C 35-iToPost.CPP 36-menu.cpp 37-MYQUEUE.CPP 38-Puzzle Game.CPP 39-Snake and ladder2.CPP 40-SORTINGS.CPP  c problem( ciitdata using enum)