Finished first group of assignments

programs/lst22/main.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+int main(void) {
+    int n;
+
+    printf("Integer n: ");
+    scanf("%d", &n);
+
+    // Don't trust user input
+    if (n < 10) {
+        printf("Integer n must be more than 2 digits.");
+        return 1;
+    }
+
+    printf("Tens digit of interger n is %d.", n / 10 % 10);
+
+    return 0;
+}