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PROGRAMMING
Submitted by Jeronika Macaraeg

http://eglobiotraining.com

TOPICS IN
PROGRAMMING:
SWITCH CASE
LOOPING


LOOPING
 Programming languages provide various
control structures that allow for more
complicated execution paths.
 A loop statement allows us to execute a
statement or group of statements multiple
times and following is the general from of
a loop statement in most of the
programming languages.


looping programming
has three types:
 FOR
 WHILE
 DO WHILE


FOR
 The statements in the for loop repeat
continuously for aspecific number of
times. The while and do-while loops repeat
until a certain condition is met. The for loop
repeats until a specific count is met. Use
a for loop when the number of repetition is
know, or can be supplied by the user


WHILE
 The while loop allows programs to repeat a
statement or series of statements, over and
over, as long as a certain test condition is
true.


Do while
 In most computer programming languages,
a do while loop, sometimes just called
a while loop, is a control flow statement that
allows code to be executed once based on a
given Boolean condition
 Unlike for and while loops, which test the
loop condition at the top of the loop,
the do...while loop checks its condition at the
bottom of the loop.


SWITCH CASE
 Switch case statements are a substitute for long
if statements that compare a variable to several
"integral" values ("integral" values are simply
values that can be expressed as an integer, such
as the value of a char). The basic format for using
the switch case in the programming is outlined
below. The value of the variable given into switch
is compared to the value following each of the
cases, and when one value matches the value of
the variable, the computer continues executing
the program from that point.


SWITCH CASE
 In programming,
a switch, case, select or inspect statement is a type of
selection control mechanism that exists in most imperative
programming languages such
as Pascal, Ada, C/C++, C#, Java, and so on. It is also included
in several other types of Programming languages. Its
purpose is to allow the value of a variable or expression to
control the flow of program execution via a multiway
branch (or "go to", one of several labels). The main reasons
for using a switch include improving clarity, by reducing
otherwise repetitive coding, and (if the heuristics permit)
also offering the potential for faster execution through
easier compiler optimization in many cases.


EXAMPLES OF SOURCE CODE IN C++
PROGRAMMING
#include <iostream>
#include <stdlib.h>
// switch statement based on the choice variable
using namespace std; switch (choice) // notice no semicolon
void welcome(); {
case 'A': // choice was the letter A
char getChar(); case 'a': // choice was the letter a
void displayResponse(char choice); cout << "your awesome dude.nn";
break; // this ends the statements for case A/a
int main(int argc, char *argv[]) case 'B': // choice was the letter b
case 'b': // choice was the letter b
{
cout << "you will find your lovelife.nn";
char choice; // declares the choice variable break; // this ends the statements for case B/b
case 'C': // choice was the letter C
welcome(); // This calls the welcome function
case 'c': // choice was the letter c
choice = getChar(); // calls getChar and returns the value for choice cout << "your will won the lottery.nn";
break; // this ends the statements for case C/c
displayResponse(choice); // passes choice to displayResponse function
case 'D': // choice was the letter D
case 'd': // choice was the letter d
cout << "your so ugly!!.nn";
system("PAUSE"); break; // this ends the statements for case D/d
return 0; default: // used when choice falls out of the cases covered above
cout << "You didn't pick a letter a, b or c.nn";
} // end main again = getChar(); // gives the user another try
// welcome function displays an opening message to displayResponse(again); // recalls displayResponse with new
character
// explain the program to the user break;
} // end of switch statement
void welcome()
} // end displayResponse function
{
cout << "This program displays different messages dependingn";
cout << "on which letter is entered by the user.n";
cout << "Pick a letter a, b, c or d to see whatn";
cout << "the program will say.nn";
} // end of welcome function
// getChar asks the user for a letter a, b or c.
// The character is returned to where the function was called. http://eglobiotraining.com

PROGRAMMING
#include <iostream.h>

int main(void) {
int x = 0;
int y = 0;
bool validNumber = false;

while (validNumber == false) {
cout << "Please enter an integer between 1 and 10: ";
cin >> x;
cout << "You entered: " << x << endl << endl;

if ((x < 1) || (x > 10)) {
cout << "Your value for x is not between 1 and 10!"
<< endl;
cout << "Please re-enter the number!" << endl << endl;
}
else
validNumber = true;
}

cout << "Thank you for entering a valid number!" << endl;

return 0;
 }


PROGRAMMING
 #include <iostream>
 using namespace std;
 main()
 { int num1, num2;
 char again = 'y';

 while (again == 'y' || again == 'Y') {
 cout << "Enter a number: ";
 cin >> num1;
 cout << "Enter another number: ";
 cin >> num2;
 cout << "Their sum is " << (num1 + num2) << endl;
 cout << "Do you want to do this again? ";
 cin >> again; }
 return 0;
 }


PROGRAMMING
#include <iostream>
#include <cmath> }
using namespace std; cout <<"nSeconds
falling distancen";
//prototype cout <<"---------------------------------------n";
int fallingdistance();
for ( count = 1; count <= time; count++)
//main function {
distance = .5 * 9.8 * pow(time,
int main() 2.0);
{ cout << count << "
int count = 1 ; " << distance <<" meters"<< endl;
int time;
double distance ; }
cout << "Please enter time in 1 through system ("pause");
return 0;
10 seconds.nn"; }
// falling distance function for a return value in seconds
time = fallingdistance(); transfer to time
int fallingdistance ()
while ( time < 1 || time > 10) {
{ cout << "Must enter between 1 and 10 int seconds;
cin >> seconds;
seconds, please re-enter.n"; return seconds;
time = fallingdistance(); }

RUNNING SOURCE FILE IN C++
PROGRAMMING



SUBMITTED TO:
EDWIN GLOBIO


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