Reading User Values
The previous program is good, but it would be better if it read in the values 5 and 7 from keyboard that is typed by the user instead of using constants. This is the program:
#include <stdio.h>
int main()
{
int d,e,f;
printf("Enter the first value:");
scanf("%d", &d);
printf("Enter the second value:");
scanf("%d", &e);
f=d+e;
printf("%d + %d = %d\n", d,e,f);
getchar();
getchar();
return 0;
}
Just by using command ‘scanf’ the Processor immediately read typed character from the keyboard. The character typed will be stored in variable d and e. & is the address operator in C: It returns the address of the variable. You must use the & operator in scanf on any variable of type char, int, or float. If you leave out the & operator, there is no error when you compile the program but you will get an error when you run the program.
There error as shown above is 4 + 5 = 4206601. This is due to missing & operator for variable d.
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
Articles :
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