Variables
In order for Computer Processor to read what we type on the keyboard and display it on the computer screen, the processor need a memory called variables to store the character that we type and display it on the computer screen.
For example:
int p;
This line of C code means, "I want to create a space called p that is able to hold a variable of type integer." A variable has a name (in this case, p) and a type (in this case, int, an integer). You can store a value in p by writing the ‘=’ operator (called assignment operator):
p = 5;
This mean p holding a value 5 in it now.
To make use of the value inside variable p, we can type something like:
printf("%d", p);
This mean value 5 will be displayed on the computer screen. In C, there are several standard types for variables:
• int - integer (whole number) values e.g 1,10,40,30
• float - floating point values e.g 1.1,3.33,2.65
• char - single character values (such as "k" or "Q")
float p;
p=3.123
printf("%f", p);
char p;
p=k
printf("%c", p);
Microcontroller
What is a Microcontroller?
Microcontroller Specification
Programming PIC16F877A
Playing with a C Programming and PIC16F877A
Creating a Digital Clock using PIC16F877A, LCD and DS1337 Clock IC from Dallas
How to Load Hex File into PIC16F877A
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Lightning Surge Testing
Bit Error Rate Testing
Insertion Loss Testing
Light Emitting Diode
DC Power Jack
Voltage Regulator and Diode
Transistor and Operational Amplifier
Trimmer Pot, Relay and PCB
Understanding PIC16F877A
Product Development Using PIC16F877A
More Product Development Using PIC16F877A
PIC16F877A Input Output Overview
Interfacing PIC16F877A With LCD
VoIP Basic
VoIP Phone
Using VoIP Through Normal PSTN Telephone
What is Codec?
C Programming Tutorial
Introduction
What is C programming language?
The First C Program
The First C Program - Explanation
Variables
Printf
Reading User Values
Scanf
Looping
Using FOR loop
Arrays
More on Arrays
Example Program that use Arrays to Compare 6 PIN number
If, Else If, Else
Functions
Pointers
Summary