Initial data commit

Task/Van-der-Corput-sequence/C/van-der-corput-sequence.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+void vc(int n, int base, int *num, int *denom)
+{
+        int p = 0, q = 1;
+
+        while (n) {
+                p = p * base + (n % base);
+                q *= base;
+                n /= base;
+        }
+
+        *num = p;
+        *denom = q;
+
+        while (p) { n = p; p = q % p; q = n; }
+        *num /= q;
+        *denom /= q;
+}
+
+int main()
+{
+        int d, n, i, b;
+        for (b = 2; b < 6; b++) {
+                printf("base %d:", b);
+                for (i = 0; i < 10; i++) {
+                        vc(i, b, &n, &d);
+                        if (n) printf("  %d/%d", n, d);
+                        else   printf("  0");
+                }
+                printf("\n");
+        }
+
+        return 0;
+}