Revision 3:f29617cd39a9, committed 2017-10-24

Comitter:

CSTritt

Date:

Tue Oct 24 17:31:14 2017 +0000

Parent:

2:68190b1e8bf3

Commit message:

Added int calculations. Cleaned up comments.

Changed in this revision

--- a/main.cpp	Thu Oct 12 20:40:08 2017 +0000
+++ b/main.cpp	Tue Oct 24 17:31:14 2017 +0000
@@ -3,25 +3,33 @@
     File: main.cpp
     Project: DivideByZero
 
-    Demonstrates divide by zero on Nucleo boards. Result is inf, not an error.
+    Demonstrates divide by zero on Nucleo boards. For floats, the result is inf, 
+    not an error. For ints, the result is 0, not an error. These results are for 
+    the default online mbed compiler settings.
     
-    Created by Dr. C. S. Tritt; Last revised 10/12/17 (v. 1.0)
+    Created by Dr. C. S. Tritt; Last revised 10/24/17 (v. 1.1)
 */
 #include "mbed.h"
 
 int main()
 {
-    printf("Hello World !\n\n");
-
-    for (int i = 5; i >= -5; i--) { // Displays inf for 1/0.
+    // Try some float values.
+    for (int i = 3; i >= -3; i--) { // Displays inf for 1/0.
         float x = (float) i;
         printf("x is %f and 1/x is %f.\n", x, 1/x);
         wait(0.5f);
     }
     
+    // Try some other things with floats.
     float x = 1.0f/0.0f; // Produces compile time warning.
-    // Prints three infs.
+    // The following displays three infs.
     printf("\nx, x+1.0 & 2.0*x are: %f, %f, %f.\n", x, x+1.0f, 2.0f*x);
+    printf("\ninf cast to int is %d.\n\n", (int)x);
     
+    // Try some int values.
+    for (int i = 3; i >= -3; i--) { // Displays 0 for 1/0.
+        printf("i is %d and 1/i is %d.\n", i, 1/i);
+        wait(0.5f);
+    }
     while (true) {}; // Just loop here forever after tests.
 }
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