METHODS AND

FLOWCHARTS

ALGORITHMS AND FLOWCHARTS

A standard programming job can be divided into

two stages:

Problem solving period

 generate

an purchased sequence of steps that describe

 this sequence of steps is known as an algorithm

Implementation phase

 put into action

language

this program in some programming

Steps in Problem Solving

Initially produce a basic algorithm (one can use

pseudocode)

Refine the algorithm successively to get step simply by

step comprehensive algorithm that is certainly very close to a

computer vocabulary.

Pseudocode can be an artificial and casual

language in order to programmers develop

algorithms. Pseudocode is very similar to

everyday English.

Pseudocode & Algorithm

Example you: Write developed to

determine a student's final grade and

suggest whether it is transferring or declining.

The final level is computed as the

average of four marks.

Pseudocode & Criteria

Pseudocode:

 Input a set of 4 represents

 Estimate their common by summing and dividing

by some

 in the event that average can be below 55

Print " FAIL”

else

Print " PASS”

Pseudocode & Protocol

Detailed Protocol

Step 1 :

Suggestions M1, M2, M3, M4

Step 2:

CLASS  (M1+M2+M3+M4)/4

Step 3:

in the event that (GRADE < 50) then simply

Print " FAIL”

different

Print " PASS”

endif

The Flowchart

(Dictionary) A schematic manifestation of a sequence of

functions, as in a manufacturing procedure or pc

program.

(Technical) A graphical representation of the sequence of

operations in an information program or plan.

Information program flowcharts present how info flows via

source documents through the laptop to last

distribution to users. Plan flowcharts show the

sequence of instructions within a program or perhaps

subroutine. Diverse symbols are more comfortable with draw each type

of flowchart.

The Flowchart

A Flowchart

 displays

logic of an algorithm

 emphasizes individual steps and the

interconnections

 e. g. control stream from one action to the next

Flowchart Symbols

Standard

Example

START OFF

Step 1 : Suggestions M1, M2, M3, M4

Step 3: in the event that (GRADE Pseudocode:

 Suggestions the length in feet (Lft)

 Estimate the length in cm (Lcm) by

 Print size in centimeter (LCM)

Example two

Flowchart

Formula

 The first step : Input Lft

 Step 2: Lcm  Lft back button 30

 Step 3: Print Lcm

START

Input

Lft

Lcm  Lft times 30

Produce

Lcm

END

Example a few

Write an algorithm and pull a flowchart that

is going to read the two sides of the rectangle and

calculate its area.

Pseudocode

 Suggestions the thickness (W) and Length (L) of a rectangular shape

 Compute the area (A) by multiplying L with W

 Print A

Example three or more

Algorithm

 Step 1 : Suggestions W, D

 Step 2: A  L back button W

 Step 3: Printing A

START OFF

Input

T, L

A Lx Watts

Print

A

STOP

Case in point 4

Write developed and attract a flowchart that

ax two  bx  c  zero

Hint: d sama dengan sqrt ( b two  4ac ), and the roots are:

x1 = (–b + d)/2a and x2 = (–b – d)/2a

Example 4

Pseudocode:

 Insight the coefficients (a, m, c) from the

 Calculate d

 Calculate x1

 Estimate x2

 Print x1 and x2

Example four

START

Algorithm:

Step 1 :

Step 2:

Step 3:

Step 4:

Step 5:

Insight a, w, c

g  sqrt ( n  w  5  a  c )

x1  (–b + d) / (2 x a)

x2  (–b – d) / (2 back button a)

Printing x1, x2

Input

a, b, c

d  sqrt(b x b – 4 times a times c)

x1 (–b + d) as well as (2 back button a)

X2  (–b – d) / (2 x a)

Print

x1, x2

STOP

DECISION SET UPS

The expression A> B is actually a logical expression

it details a condition we wish to test

if perhaps A> W is true...

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