Diff: main.cpp

Revision:

110:8170476d91a6

Parent:

109:744c6cb711bf

--- a/main.cpp	Thu Sep 23 03:03:59 2021 +0000
+++ b/main.cpp	Fri Sep 24 16:28:15 2021 +0000
@@ -16,12 +16,14 @@
     // not good practice, but I want to use the DigitalIn object in these 
     // contexts to illustrate my points. See while loop below for a better 
     // (more common and realistic) approach.   
-    while(true) {
+    //while(true) { // Standard infinite loop.
+    for (;;) { // Alternative infinite loop.
         // Use the button in some printf calls.
         printf("\nuB (w/o cast) = %d.\n", uB); // Bad! Warning! Wrong!
         printf("uB (with int cast) = %d.\n", static_cast<int>(uB));
         // I found a reference that claimed there is a %b (or B) speicifer for 
-        // type bool, but it doesn't work in mbed.  
+        // type bool, but it doesn't work in mbed. So use %d to see it as a 
+        // decimal value.
         printf("uB (with bool cast) = %d.\n", static_cast<bool>(uB));                              
         printf("uB.read = %d.\n", uB.read());  
         
@@ -62,6 +64,9 @@
             } //end of if.
         ThisThread::sleep_for(500); // For 0.5 seconds in while.
         } // end of !uBstate while.
-        printf("End of main while.\n\n");
+        if (uBstate)
+            printf("Button released during countdown.\n\n");
+        else 
+            printf("Countdown completed.\n\n");
     } // end of main while.
 } // end of main function.
\ No newline at end of file