Charles Tritt / Mbed OS PointerScanf

Demonstrates the use of pointers with scanf.

Fork of RawSerial_ex_2 by mbed_example

main.cpp@1:3e364d2f184a, 2017-11-05 (annotated)

Committer:
CSTritt
Date:
Sun Nov 05 20:25:25 2017 +0000
Revision:
1:3e364d2f184a
Parent:
0:3b040f367dd8 
Initial version.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 1:3e364d2f184a 1 /*
CSTritt 1:3e364d2f184a 2 Project: PointerScanf
CSTritt 1:3e364d2f184a 3 File: main.cpp
CSTritt 1:3e364d2f184a 4 Revised by Dr. C. S. Tritt
CSTritt 1:3e364d2f184a 5 11/3/17
CSTritt 1:3e364d2f184a 6
CSTritt 1:3e364d2f184a 7 Use a pointer, rather than a reference in scanf. Based on a Horton,
CSTritt 1:3e364d2f184a 8 Chapter 7 example.
CSTritt 1:3e364d2f184a 9 */
mab5449 0:3b040f367dd8 10 #include "mbed.h"
mab5449 0:3b040f367dd8 11
CSTritt 1:3e364d2f184a 12 // Use an explicit Serial object (as opposed to the implicit one) for a change
CSTritt 1:3e364d2f184a 13 // of pace...
CSTritt 1:3e364d2f184a 14 Serial pc(USBTX, USBRX);
mab5449 0:3b040f367dd8 15
CSTritt 1:3e364d2f184a 16 int main(void)
CSTritt 1:3e364d2f184a 17 {
CSTritt 1:3e364d2f184a 18 int value = 0;
CSTritt 1:3e364d2f184a 19 int *pValue = &value; // Set pointer to refer to value.
CSTritt 1:3e364d2f184a 20 pc.printf ("\nTurn local echo on.\n");
CSTritt 1:3e364d2f184a 21 pc.printf ("Enter an integer: ");
CSTritt 1:3e364d2f184a 22 pc.scanf(" %d", pValue); // Read into value via the pointer.
CSTritt 1:3e364d2f184a 23 pc.printf("You entered %d (base 10).\n", value); // Display the value entered.
CSTritt 1:3e364d2f184a 24 pc.printf("Which is %x (base 16).\n", value); // Display the value entered.
CSTritt 1:3e364d2f184a 25 pc.printf("Done. Now I sleep.\n");
CSTritt 1:3e364d2f184a 26 while (true) wait(3600.0f);
CSTritt 1:3e364d2f184a 27 }