Created problem template in C, largely unfinished.

Author: SulamYakov

1/p1.c

@@ -0,0 +1,25 @@
+// Project Euler : Problem 1
+
+#include <stdio.h>
+
+long gcd(long a, long b);
+
+int main(int argc, char*argv[]) {
+    int args_allowed = 4;
+    if (argc == args_allowed) {
+        long mult1 = *argv[1], mult2 = *argv[2], lim = *argv[3];
+        if (mult1 > lim || mult2 > lim) {
+            printf("Argument error: the limit must be greater than both multiples."); 
+            return -1;
+        } else {
+            printf("%l", gcd(mult1, mult2));
+        }
+    } else { 
+        printf("CLI error: incorrect number of arguments supplied to the script.\n The correct number for this script is: %d", args_allowed);
+        return -1;
+    }
+}
+
+long gcd(long a, long b) {
+
+}