fp201 3.prog control

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Chapter 3program control

3.1 Solve problems using selection control

structures3.2 Loops control structures

FP201: ProgrammingFundamentals/ Chapter 3


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LETS DO PRE-TEST !


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3.1 SOLVE PROBLEMS USINGSELECTION CONTROL STRUCTURES

Learning Outcomes 3.1At the end of this sub-chapterstudents should be able to:

. 3.1.1 Explain the

selection statement:


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At the end of this sub-chapter,students should be able to:

. 3.1.1Explain the selection

statement:

3.1 SOLVE PROBLEMS USINGSELECTION CONTROL

STRUCTURES


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SELECTION CONTROL ? It allows instructions to be executed in a non-

sequential ways.

The user can choose what he want to process.

It compares two expressions.

Based on the comparison, it takes a certain courseof action.


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Pairing Activity 1Comparing & identify a variety typeof selection control

Instructions:

1. You are given a few program sample.

2. Identify the type of selection control foreach program code

3. Your answer will be discuss for the nextlecture.
http://var/www/apps/conversion/current/tmp/FP201.T&L%20Strategies/5%20minutes%20Pairing%20DiscussionProgram%20samples.docxhttp://var/www/apps/conversion/current/tmp/FP201.T&L%20Strategies/5%20minutes%20Pairing%20DiscussionProgram%20samples.docx


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Single if If else Nested if

Used to execute a set ofstatements when the givencondition is satisfied.Conditional statementswithin the block areexecuted when thecondition in the ifstatement is satisfied.

Executes the set ofstatements in if block,when the given condition issatisfied.Executes the statements inthe else block, when thecondition is not satisfied.

The if statements writtenwithin the body of anotherif statement to testmultiple conditions iscalled nested if.


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Syntax : If selection control

Single if If else Nested if if(){

;

}

if (){< statements1>;}else{

;

}

if (){

if(){;}else{;}

}

else{;}

Inner if

Outer if


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Program 1

/* Program to check whether the givennumber is less than 50 */

#include

using namespace std;

void main()

{

int num;

cin >> num;

if (num < 50)

cout


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Program 2

/* Program to check whether the givennumber is less than 50 */

#include


void main()

{

int num;

cin >> num;

if (num < 50)" "

Type of Selection control ? If else

How manycondition?

Which are the

condition?


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Program 3#include


void main()

{

int num;

cout > num;

if (num > 0)

{

if (num < 10)

cout


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Program 4#include using namespace std;void main(){int num;

cout > num;if (num < 0)cout


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Pairing Activity 2Develop flow chart and find the output

Instructions:1. You are choose 2 program sample (from

Activity 1).

2. Develop flow chart

3. Give possible input and output for theprogram
http://var/www/apps/conversion/current/tmp/FP201.T&L%20Strategies/5%20minutes%20Pairing%20DiscussionProgram%20samples.docxhttp://var/www/apps/conversion/current/tmp/FP201.T&L%20Strategies/5%20minutes%20Pairing%20DiscussionProgram%20samples.docx


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iii. Switch statement Is a multi-way selection statement.

Contains various case statements. The case statements are executed based on thevalue of the expression.

Abreak statement passes the control outsideswitch structure.


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Syntax of Switch Statement

switch (Expression)

{

case exp_1:

statement 1;

break;

case exp_2:

statement 2;

break;


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Sample Program

#include void main()

{

int Month;cout > Month;switch (Month)

{

case 1: cout


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. 3.1.2Convert the nested if

statement to switch case


STRUCTURES


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Convert the switch to ifelse

statement IF SWITCH#include

void main()

{

int Month;

cout Month;

#include

void main()

{

int Month;

cout Month;


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. 3.1.2 Describe the function of breastatement


STRUCTURES


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Break is used withinloops and switch

statements to jump tothe end of the codeblock.

It causes the "//code..."above to be skipped andterminates the loop.

In switch case

statements, break causes

loop

{break;//code...

}

switch( variable )

{case value:/* code */break;

case value:/* code */break;

}


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. 3.1.4 Solve a given problem bywriting algorithm and program,

run, test and debug using selection


STRUCTURES


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Activity


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Program Sample 1:ifStatementint num1, num2, min;

coutnum1 >> num2;

min = num1;

if (num1 > num2)min = num2;

cout


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Program Sample 2:ifStatementint mark;

cout mark);

mark if (mark > 80)

{

cout


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Test your skill

1. Write a program to input at least 2data from user. Process the data anddisplay the output.

Example output

Total Buying: RM 80

Total Pay : RM 100


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3.2 LOOPS AND CONTROL STRUCTURES

Learning Outcomes 3.2At the end of this sub-chapterstudents should be able to:

.

. 3.2.1 Identify the


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