Begin: C, C#, Haskell, Java, Python

1 files changed, 46 insertions, 0 deletions

diff --git a/gcd.c b/gcd.c
new file mode 100644
index 0000000..5a520be
--- /dev/null
+++ b/gcd.c
@@ -0,0 +1,46 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+unsigned int gcd2(unsigned int a, unsigned int b)
+{
+    unsigned int c;
+    while (b != 0) {
+        c = b;
+        b = a % b;
+        a = c;
+    }
+    return a;
+}
+
+unsigned int gcdn(unsigned int a[], size_t n)
+{
+    unsigned int r;
+    size_t i;
+    r = a[0];
+    for(i = 1; i < n; i++) {
+        r = gcd2(r, a[i]);
+    }
+    return r;
+}
+
+
+int main (int argc, char *argv[])
+{
+    unsigned int *a;
+    int i, n;
+
+    if (argc > 1) {
+        n = argc - 1;
+        a = malloc(sizeof(unsigned int) * n);
+        if (NULL != a) {
+            for (i = 1; i <= n; i++)
+                a[i-1] = atoi(argv[i]);
+            printf("%u\n", gcdn(a, n));
+            free(a);
+            return EXIT_SUCCESS;
+        }
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+