Diamond

diamond/diamond.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void d_line(unsigned int i, unsigned int n) {
+    unsigned int j;
+    for (j = 0; j < n - i; j++)
+        putchar(' ');
+    for (j = 0; j < (2*i - 1); j++)
+        putchar('#');
+    putchar('\n');
+}
+
+void diamond(int n) {
+    if (n <= 0) {
+        return;
+    }
+
+    unsigned int i;
+
+    for (i = 1; i <= n; i++) {
+        d_line(i, n);
+    }
+    for (i = n-1; i > 0; i--) {
+        d_line(i, n);
+    }
+}
+
+int main(int argc, char** argv) {
+    if (argc != 2) {
+        fprintf(stderr, "Usage: %s [side]\n", argv[0]);
+        return 1;
+    }
+    diamond(atoi(argv[1]));
+}
+