Epc Dethithuchanh

De thi mon C lop T0610I [25 diem] [5 diem ] Tao menu nhu sau: ***************** *Ho ten: nguyen van a *Lop : T0610I *Ma HV : A0001 ***************** **** Menu **** 1.Cau hoi1 2.Cau hoi2 3. Cau hoi3 4.Thoat Chon [1,2,3,4]: Yeu cau: neu nguoi dung chon 1 thi thuc hien cau hoi1, chon 2 thuc hien cau 2, chon 3 thuc hien cau 3, chon 4 thoat chuong trinh. [7 diem]Cau hoi1: Nhap vao mot day so tu nguoi dung, viec nhap so vao day so chi duoc dung lai khi nguoi dung nhap so 0. A, Hien thi day so da nhap [4 diem] B, Kiem tra xem day so do co doi xung khong? Vi du: aba doi xung, abb khong doi xung [3 diem] [7 diem]Cau hoi2: Tinh giai thua cua so n. Vi du: 5!=5*4*3*2*1; [6 diem]Cau hoi3: Nhap vao mot so nguyen duong, va hien thi tat cac cac so le duong nho hon so nguyen duong da nhap vao