Published by
Jan 20, 2012 (last update: Jan 21, 2012)

Decimal to radix conversion

Score: 2.6/5 (19 votes)
*****
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
#include <iostream>
#include <limits>
#include <string>

// Positional value
unsigned short store = 0;

// This is to hold how many positions we need to check
unsigned short highest;

unsigned short base;
unsigned long number;

bool first;

// Return a number input
int cin_int(std::string msg);

int main() {

        std::cout << "Decimal to Radix converter\n\
Instead of representing values that are above 9 as letters (e.g., in hex) a value is shown in between pipes.\ 
(Converting 255 to hex would not output 'FF', it would output '15|15')\n(Ctrl+C 
to exit)\n";

        while (true) {

                highest = 1;

                base   = cin_int("Enter an integer radix:\n");
                number = cin_int("Enter an integer to convert:\n");

                std::cout << "Result of conversion: \n";

                // Figure out the highest position that the number could calculate to
                for (unsigned short i = 1; i < number; i *= base) {

                        highest *= base;

                }

                first = true;

                for (unsigned short i = highest; i > 0; i /= base) {

                        // Prevent a leading 0
                        if (first) {

                                first = false;
                                continue;

                        }

                        store = 0;

                        for (unsigned short d = 1; d < base; d++) {

                                if (number / i % base == d) {

                                        store = d;
                                
                                }

                        }

                        std::cout << store;

                        // Output a pipe between positions
                        if (i >= base) {

                                std::cout << '|';

                        }

                }

                std::cout << std::endl;

        }

        return 0;

}

int cin_int(std::string msg) {

        int num;

        while (true) {

                std::cout << msg;

                while (!(std::cin >> num)) {

                        std::cout << msg;
                        std::cin.clear();
                        std::cin.ignore(std::numeric_limits<std::streamsize>::max(),'\n');

                }

                if (num > 1) break;
                else {

                        std::cout << "Input must be above 1!\n";

                }

        }

        return num;

}