Added programs for 2nd half of assignment

programs/printf-formats/main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int main(void) {
+    int n;
+    double x;
+
+    printf("Int n: "); scanf("%d", &n);
+    printf("Doble n: "); scanf("%f", &x);
+
+    printf("Integer n is %d\n", n);
+    printf("Double percision floating point decimal x is %f\n", x);
+
+    return 0;
+}