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PZ2.1.cpp

+#include <iostream>
+#include <iostream>
+using namespace std;
+
+char digit(int num)
+{
+  switch (num) {
+  case 0: return '0';
+  case 1: return '1';
+  case 2: return '2';
+  case 3: return '3';
+  case 4: return '4';
+  case 5: return '5';
+  case 6: return '6';
+  case 7: return '7';
+  case 8: return '8';
+  case 9: return '9';
+  case 10: return 'A';
+  case 11: return 'B';
+  case 12: return 'C';
+  case 13: return 'D';
+  case 14: return 'E';
+  case 15: return 'F';
+  }
+}
+
+int dectox_int(int a, int p, char *s)
+{
+  int num = (int)a;
+  int rest = num % p;
+  num /= p;
+  if (num == 0)
+  {
+    s[0] = digit(rest); return 1;
+  }
+  int k = dectox_int(num, p, s);
+  s[k++] = digit(rest);
+  return k;
+}
+
+
+
+int main()
+{
+  double a;
+  char s[80] = { 0 };
+  int p;
+  system("chcp 1251");
+  system("cls");
+  cout << "Enter digit: ";
+  cin >> a;
+  cout << "Enter a digit system: ";
+  cin >> p;
+  int k = dectox_int((int)a, p, s);
+  cout << s;
+  cin.get(); cin.get();
+  return 0;
+}