adding the programs

labs/04_memory_debugging/grains.cpp

@@ -0,0 +1,10 @@
+float* oat[3];
+oat[1] = new float;
+*oat[1] = 3.14;
+oat[2] = new float;
+*oat[2] = 6.02;
+float rice;
+float* wheat;
+wheat = oat[2];
+float** barley = new float*;
+*barley = oat[1];