Diff: main.cpp

Revision:

2:68190b1e8bf3

Parent:

1:a000e0121191

Child:

3:f29617cd39a9

--- a/main.cpp	Thu Oct 12 19:57:14 2017 +0000
+++ b/main.cpp	Thu Oct 12 20:40:08 2017 +0000
@@ -1,35 +1,27 @@
 
 /*
     File: main.cpp
-    Project: ArrayLimits
+    Project: DivideByZero
 
-//------------------------------------
-// Tera Term configurations
-// Terminal - New-line, Receive LF, Transmit LF
-// Serial port - Data 8 bit, Parity none, Stop 1 bit data, Flow control none.
-// Baud as specified below.
-//------------------------------------
-
-// Serial pc(SERIAL_TX, SERIAL_RX, 921600); // Highest Tera Term speed - works.
-// Serial pc(USBTX, USBRX, 115200); // Highest common speed - works.
-// Serial pc(USBTX, USBRX); // Default 9600 baud, alternate pin names - works.
+    Demonstrates divide by zero on Nucleo boards. Result is inf, not an error.
+    
+    Created by Dr. C. S. Tritt; Last revised 10/12/17 (v. 1.0)
 */
 #include "mbed.h"
 
 int main()
 {
-    float a[] {1.0, 3.0, 5.0, 7.0, 9.0 };
-    printf("Hello World !\n");
+    printf("Hello World !\n\n");
 
-    for (int i = 0; i > -10; i--) { // Displays zeros and one NaN.
-        printf("a[%d] is %f.\n", i, a[i]);
+    for (int i = 5; i >= -5; 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);
     }
     
-    for (int i = 0; i < 10; i++) { // Hangs after 6th value!
-        printf("a[%d] is %f.\n", i, a[i]);
-        wait(0.5f);
-    } 
+    float x = 1.0f/0.0f; // Produces compile time warning.
+    // Prints three infs.
+    printf("\nx, x+1.0 & 2.0*x are: %f, %f, %f.\n", x, x+1.0f, 2.0f*x);
     
     while (true) {}; // Just loop here forever after tests.
 }
\ No newline at end of file