P1-P5: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

P5.java

@@ -0,0 +1,20 @@
+import java.util.function.Consumer;
+
+class P5 {
+  public static void main(String[] _args) {
+      int sub[] = { 64, 91, 45 };
+      P5 obj = new P5();
+      int sum = 0;
+
+      for (int i = 0; i < sub.length; i++) {
+          obj.grade(sub[i], i + 1);
+          sum += sub[i];
+      }
+
+      System.out.println("Overall Percentage: " + (float) sum / 3 + "%");
+  }
+
+    void grade(int n, int s) {
+        System.out.println( "Subject " + s + " grade: " +  (char)( n >= 90 ? 'A' : n < 50 ? 'F' : 'A' + (9 - n / 10)));
+    }
+}