Charles Tritt / Mbed 2 deprecated GlobalExample

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Dependencies:   mbed

Fork of FunctionExample by Charles Tritt

main.cpp@1:8a2fb22f43f3, 2017-10-03 (annotated)

Committer:
CSTritt
Date:
Tue Oct 03 18:05:17 2017 +0000
Revision:
1:8a2fb22f43f3
Parent:
0:27aceb51cedb
Child:
2:c0ac34a64be1
Add forgot final c value display.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 0:27aceb51cedb 1 /*
CSTritt 0:27aceb51cedb 2 Project: FunctionExample
CSTritt 0:27aceb51cedb 3 File: main.cpp
CSTritt 0:27aceb51cedb 4
CSTritt 0:27aceb51cedb 5 This simple program demonstrates that C passes arguments by value.
CSTritt 0:27aceb51cedb 6 See http://www.csie.ntu.edu.tw/~r92094/c++/VT100.html for escape sequences.
CSTritt 0:27aceb51cedb 7
CSTritt 0:27aceb51cedb 8 Written by: Dr. C. S. Tritt; Last revised 10/3/17 (v. 1.0)
CSTritt 0:27aceb51cedb 9 */
CSTritt 0:27aceb51cedb 10 #include "mbed.h"
CSTritt 0:27aceb51cedb 11
CSTritt 0:27aceb51cedb 12 int myFunc(int x, int y); // Function declaration required.
CSTritt 0:27aceb51cedb 13
CSTritt 0:27aceb51cedb 14 int main() {
CSTritt 0:27aceb51cedb 15 while(true) {
CSTritt 1:8a2fb22f43f3 16 const char ESC=27; // Optional - Define escape for escape sequence.
CSTritt 1:8a2fb22f43f3 17 printf("%c[2J", ESC); // Optional - VT100 clear screen escape sequence.
CSTritt 0:27aceb51cedb 18 printf("In function demo main...\n");
CSTritt 0:27aceb51cedb 19 int a = 5; // Create and initialize a.
CSTritt 0:27aceb51cedb 20 printf("a = %d\n", a); // Display a.
CSTritt 0:27aceb51cedb 21 int b = 6; // Create and initialize b.
CSTritt 0:27aceb51cedb 22 printf("b = %d\n", b); // Display b.
CSTritt 0:27aceb51cedb 23 printf("About to call my function.\n");
CSTritt 0:27aceb51cedb 24 int c = myFunc(a, b); // Call my function.
CSTritt 0:27aceb51cedb 25 printf("Function has returned.\n");
CSTritt 0:27aceb51cedb 26 printf("a = %d\n", a); // Redisplay a.
CSTritt 0:27aceb51cedb 27 printf("b = %d\n", b); // Redisplay b.
CSTritt 0:27aceb51cedb 28 printf("c = %d\n", c); // Display b.
CSTritt 0:27aceb51cedb 29 wait(2.0f); // Pause for a second.
CSTritt 0:27aceb51cedb 30 }
CSTritt 0:27aceb51cedb 31 }
CSTritt 0:27aceb51cedb 32
CSTritt 0:27aceb51cedb 33 int myFunc(int x, int y) { // Function definition. Often in seperate files!
CSTritt 0:27aceb51cedb 34 int z = x + y;
CSTritt 0:27aceb51cedb 35 // Changing parameter values here won't change argument values in main!
CSTritt 0:27aceb51cedb 36 x = 50;
CSTritt 0:27aceb51cedb 37 printf("x = %d\n", x); // Generally don't put I/O in regular functions.
CSTritt 0:27aceb51cedb 38 y = 100;
CSTritt 0:27aceb51cedb 39 printf("y = %d\n", y); // Generally don't put I/O in regular functions.
CSTritt 0:27aceb51cedb 40 return z; // Explicit return is required in C/C++.
CSTritt 0:27aceb51cedb 41 }