Array-----binary number and decimal number interchange

2. Binary number converted to decimal number
4. #include "stdafx.h"
6. #include <iostream>
8. #include <string.h>
10. #include <process.h>
12. using namespace Std;
14. void Main () {
16. int I, BITV, w=1, value = 0;//value cumulative sum, BITV bit value (0 or 1), W weight
18. Char a[20];
20. cout << "Enter a bit binary number (less than):" <<endl;
22. Cin >> A;
24. for (i = strlen (a)-1; I >= 0; i--) {
26. BITV = A[i];
28. if (Bitv = = ' 1 ')//Note string form
30. Value + = W;
32. Else
34. if (bitv! = ' 0 ')
36. {//Judging input is wrong
38. cout << "Enter error!";
40. Exit (0);
42. }
44. W *= 2; Replacement weight Value
46. }
48. cout << "-------------result-------------" << Endl;
50. cout << a << "(2) =" <<value << "(Ten) <<endl;
52. }
54. -----------------------------------------------------------------------------------

Decimal number converted to binary number (successive except two, the remainder is inverted)

1. #include "stdafx.h"
2. #include <iostream>
3. using namespace Std;
4. void Main () {
5. int n,bitv,i=0;
6. int a[20];
7. cout << "Please enter a integer ():" <<endl;
8. CIN >> N;
9. while (n >= 1) {
10. BITV = n 2;
11. A[i] = BITV;
12. i++;
13. n/=2;
14. }
15. cout << N << "(10) =";
16. for (int j = i-1; J >= 0; j--) {
17. cout << A[j];
18. }
19. cout << "(2)" <<endl;
20. }

Array-----binary number and decimal number interchange