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#include <assert.h>
#include <limits>
#include <stdexcept>
#include <string>
#include <iostream>
using namespace std;
namespace { char const digit[] = "0123456789ABCDEF"; }
void print(int value, int base = 10) {
int const MXS = 128; // Maximum number of digits
assert((numeric_limits<int>::radix==2)
& (numeric_limits<int>::digits<=MXS));
if ((base<2) | (base>16))
throw std::domain_error(std::string("Print error"));
char rep[MXS+2];
rep[MXS+1] = '\0'; // Place an end-of-string marker
if (value<0) { // Add in the sign if needed
rep[0] = '-'; // This may have to move later
value = -value;
} else
rep[0] = '+';
char *p = rep+MXS; // Start at the end
do { // Move back, inserting digits as you go
*p-- = digit[value%base];
value = value/base;
} while (value);
*p = rep[0]; // Place the sign just before the most
// significant digit.
std::cout << p;
}

int main() {
for (int base = 10; base<11; ++base) {
std::cout << "1000 in base " << base << ": ";
print(1000, base);
std::cout << '\n';
}
return 0;
}
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