first commit!

arrays.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main() {
+  int ch, n_whitesp, n_other;
+  int n_digit[10] = {0}; /* initialize array with zeroes */
+
+  n_whitesp = n_other = 0;
+
+  while ((ch = getchar()) != EOF)
+    if (ch >= '0' && ch <= '9')
+      ++n_digit[ch - '0'];
+    else if (ch == ' ' || ch == '\n' || ch == '\t')
+      ++n_whitesp;
+    else
+      ++n_other;
+
+  printf("digits = ");
+  for (int i = 0; i < 10; ++i)
+    printf(" %d", n_digit[i]);
+  printf(", white space = %d, other = %d\n", n_whitesp, n_other);
+}