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Nhi_Phan.cpp
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// Nhi_Phan.cpp #include <iostream> #include <math.h> using namespace std; void nhap(int &n) { do { cout<<"Nhap so nguyen duong: "; cin>>n; if (n < 0) cout<<"Vui long nhap lai"<<endl; } while (n < 0); } int nhi_phan1(int n) { int bin = 0; int vitri = 1; while (n != 0) { bin += n % 2 * vitri; n /= 2; vitri *= 10; } return bin; } int nhi_phan2(int n) { if (n == 0) return 0; return nhi_phan2(n/2) * 10 + n % 2; } int main() { int n; nhap(n); cout<<"Ket qua la: "<<nhi_phan2(n); return 0; }