chapter 4

chapter 4

1) Arithmetic operators :

    + + (Unary Plus)

    - - (Unary minus)

    + (Addition)

    - (Substraction)

    * (multiplication)

    / (Floating-point division / Integer division)

    % (Modulus)

Dlm C++, ade increament nan decrement operator..

    + + (Pre-increment) e.g + +m

    + + (Post-increment) e.g m+ +

    - - (Pre-decrement) e.g - -n

    - - (Post-decrement) e.g n- -

Tips utk sng hfl : klw simbol dy tuh kt dpn variable (Pre-), kne tambah or tolak nan 1.. tp klw simbol kt blkng (Post-) xyah tmbah pape.. ekot jek mcm soklan dy.. aq bg cth k..

SOALAN :        a = 2 , b = 3

                      m = 2 , n = 3

                       p = 2 , q = 3

                       x = 2 , y = 3            

(+ + a) + (- - b) * 4 > (+ + m) * (- - n) + 4

testing :)

2/21/2011

 

SOALAN :

             

SOALAN :

             

JAWAPAN :

              

3/02/2011last week nye class..

3/02/2011

last week nye class..

QUESTIONS :

1) Solve the question below

    Solve the working

    a) 5 * 2 % 3 + 25 / 5

    b) a = 5 , b = 6

        !(( a < 3 ) & & ( a = = 3 ) | | ( b > 9 ))

2) Identify the syntex error in the following program

    include<iostream.h>

    mai()

    {

     float allowance=300.00,salary;

    cout<<''Input Salary=";

    cin>salary;

    Tsalary=Sallary+Allowance;

    cout<<"salary is="<<salary;

    }

3) Write a program that will calculate the monthly salary for an employee that where
    Saturday and Sunday are considered as non-working days.

4) Write a program that calculates the average of 5 numbers that can be input by user.

5) Write a program that will calculate the area of rectangular, triangle and circle.

msok cls, nmpk je kak lia n kak syezza, aq tros join dorang.. discuss cmne na wt jwpn utk questions yg mis bg last week.. actually num 1 nan 2 aq da wt da.. tp ade salah siket.. tQ kak syezza sbb da tego part mne yg sala.. ok jom bwat jwpn.. hee

jom try test wt latihan

1) a) 5 * 2 % 3 + 25 / 5

        = (5 * 2) % 3 + (25 / 5)  settle bhgi nan darab dlu

        = (10 % 3) + 5  settle modulus dlu

        = 1 + 5

        = 6

   b) a = 5 , b = 6

       !(( a < 3 ) & & ( a = = 3 ) | | ( b > 9 ))

       = !(( 5 < 3 ) & & ( 5 = = 3 ) | | ( 6 > 9 ))   msok kn nilai a nan b dlu

       = !((    0   ) & & (     0     ) | | (    0    ))   tntukan true / 1 or false / 0

       = !((    0   ) & & (     0     ) | | (    0    ))   settle kn & & dlu

       = !((    0    ) | | (    0    ))   br settle kn | |

       = !(0)   klu not / !, kne tebalek kn

       = 1 / True

2) Identify the syntex error in the following program

    include<iostream.h>  x letak simbol #

    mai()  ejaan sala, tetinggal hruf n

    {

     float allowance=300.00,salary;

    cout<<''Input Salary=";

    cin>salary;  sala simbol, ptot nye >>

    Tsalary=Sallary+Allowance;  formula sala, hruf T x perlu ade

    cout<<"salary is="<<salary;  lpas output, kne ltax return 0;

    } 

   JAWAPAN :
    #include<iostream.h>

    main() 

    {

     float allowance=300.00,salary;

    cout<<''Input Salary=";

    cin>>salary; 

    salary=Sallary+Allowance; 

    cout<<"salary is="<<salary;
    return 0;

    } 

3) FORMULA : working_days=day_of_month-non_working_days
                          monthly_salary=daily_salary*working_days
    #include<iostream.h>
    main()
    {
    //declare variable
    float day_of_month;
    float non_working_days;
    float daily_salary;
    float working_days;
    float monthly_salary;
    //input 1
    cout<<"total day of that month=";
    cin>>day_of_month;
    //input 2
    cout<<"non working days is about =";
    cin>>non_working_days;
    //input 3
    cout<<"daily salary is=";
    cin>>daily_salary;
    //formula 1
    working_days=day_of_month-non_working_days;
    //output 1
    cout<<"total working days is ="<<working_days;
    //formula 2
    monthly_salary=daily_salary*working_days;
    //output 2
    cout<<"the monthly salary is ="<<monthly_salary;
    return 0;
    }

4) FORMULA : total = num 1 + num 2 + num 3 + num 4 + num 5
                       average = total / 5
    #include<iostream.h>
    main()
    {
    //declare variable
    float num1;
    float num2;
    float num3;
    float num4;
    float num5;
    float total;
    float average;
    //input 1
    cout<<"enter num1";
    cin>>num1;
    //input 2
    cout<<"enter num2";
    cin>>num2;
    //input 3
    cout<<"enter num3";
    cin>>num3;
    //input 4
    cout<<"enter num4";
    cin>>num4;
    //input5
    cout<<"enter num5";
    cin>>num5;
    //formula 1
    total=num1+num2+num3+num4+num5;
    //output 1
    cout<<"total="<<total;
    //formula 2
    average=total/5;
    //output 2
    cout<<"average="<<average;
    return 0;
    }

5) FORMULA : area of rectangle = height * width
                        area of circle = 3.14 * radius * radius
                        area of triangle = 0.5 * height * base
    #include<iostream.h>
    main()
    {
    //declare variable
    float height;
    float width;
    float radius;
    float base;
    float area_of_rectangle;
    float area_of_circle;
    float area_of_triangle;
    //input 1
    cout<<"enter height";
    cin>>height;
    //input 2
    cout<<"enter width";
    cin>>width;
    //input 3
    cout<<"enter radius";
    cin>>radius;
    //input 4
    cout<<"enter base";
    cin>>base
    //formula 1
    area_of_rectangle=height*width;
    //output 1
    cout<<"the area of rectangle is="<<area_of_rectangle;
    //formula 2
    area_of_circle=3.14*radius*radius;
    //output 2
    cout<<"the area of circle is="<<area_of_circle;
    //formula 3
    area_of_triangle=0.5*height*base;
    //output 3
    cout<<"the area of triangle is="<<area_of_triangle;
    return 0;

lalalalala

 blaja pasal if...else statement & switch...case statement

ok bdasarkan table kt ats . kite bole wt program dlm 2 jenis bentuk . sama ade dlm bntuk if...else ataupon switch...case . ok now kite wt dlm bentuk if..else statement dlu k ..

IF...ELSE STATEMENT

#include<iostream.h>

main()

{

//declare variable

int age;

//input

cout<<"Enter your age=";

cin>>age;

//if...else statement

if(age>=1||age<=6)

{cout<<"you are kids !!";}

else if(age>=7||age<=12)

{cout<<"you are child !!";}

else if(age>=13||age<=21)

{cout<<"you are teenager !!";}

else if(age>=22||age<=30)

{cout<<"you are adult !!";}

else if(age>30)

{cout<<"you are old !!";}

else

{cout<<"Invalid selection";}

return 0;

}

SWITCH...CASE STATEMENT

#include<iostream.h>

main()

{

//declare variable

int age;

//input

cout<<"Enter your age=";

cin>>age;

//switch...case statement

switch(age)

{

case('age'>=1||'age'<=6):cout<<"you are kids !!";break;

case('age'>=7||'age'<=12):cout<<"you are kids !!";break;

case('age'>=13||'age'<=21):cout<<"you are kids !!";break;

case('age'>=22||'age'<=30):cout<<"you are kids !!";break;

case('age'>30):cout<<"you are kids !!";break;

default:cout<<"Invalid selection";

}

return 0;

}

hmm kadang soklan suh kite tuka if...else jd switch...case . kadang tuka switch...case g if...else . tp kadang soklan ta bg programming, tp kite kene develop sndry..

for loop & while loop...!

for loop & while loop pulaaak !

FOR LOOP#include<iostream.h>
main()
{
//declare variable
int x,y;
cout<<"Enter an integer=";
cin>>x;
//loop for
for(y=1;y<x;y++)
{
cout<<" "<<x;
}
return 0;
}

WHILE LOOP#include<iostream.h>
main()
{
//declare variable
int x,y;
cout<<"Enter an integer=";
cin>>x;
//while
y=x;
while(y<x)
{
cout<<" "<<x;
y++;
}
return 0;
}

homework...

1) Change the if...else statement below to switch...case statement
#include<iostream.h>
main()
{
int nomA,nomB,selection,value;
cout<<"Enter 2 number:";
cin>>nomA>>nomB;
cout<<"1.Addition";
cout<<"2.Substraction";
cout<<"3.Multiply";
cout<<"4.Division";
cout<<"Enter selection=";
cin>>selection;
if(selection==1)
{value=nomA+nomB;}
else if(selection==2)
{value=nomA-nomB;}
else if(selection==3)
{value=nomA*nomB;}
else if(selection==4)
{value=nomA/nomB;}
else
{cout<<"Invalid selection";}
cout<<"The value is:"<<value;
return 0;
}

#include<iostream.h>
main()
{
int nomA,nomB,selection,value;
cout<<"Enter 2 number:";
cin>>nomA>>nomB;
cout<<"1.Addition";
cout<<"2.Substraction";
cout<<"3.Multiply";
cout<<"4.Division";
cout<<"Enter selection=";
cin>>selection;
switch(selection)
{
case1:"value=nomA+nomB";break;
case2:"value=nomA-nomB";break;
case3:"value=nomA*nomB";break;
case4:"value=nomA/nomB";break;
default:cout<<"Invalid selection";
cout<<"The value is:"<<value;
}
return 0;
}

2) Change the for loop statement below to while loop
#include<iostream.h>
main()
{
int i,power2;
for(i=1;i<=9;i++)
{
power2=i*i;
cout<<" "<<i<<"power2"<<power2;
}
return 0;
}

#include<iostream.h>
main()
{
int i,power2;
//while
i=1;
while(i<=9)
{
power2=i*i;
cout<<" "<<i<<"power2"<<power2;
i++;
}
return 0;
}

3) Write a program that input 2 numbers. Compare the numbers & display only the biggest number. If the numbers are same, display the numbers are same.
#include<iostream.h>
main()
{
int nomA,nomB;
cout<<"Enter 2 numbers=";
cin>>nomA>>nomB;
if(nomA>nomB)
{cout<<"nom A is bigger than nom B";}
else if(nomA==nomB)
{cout<<"nom A is same as nom B";}
else
{cout<<"Invalid";}
return 0;
}

4) Write a program using for loop that receive prices of 3 products. Calculate the price that must be paid after 10% discount is given to every customer.
#include<iostream.h>
main()
{
int x,price,total,discount;
for(x=1;x<4;x++)
{
cout<<"price["<<x<<"]:";
cin>>price;
total=total+price;
}
cout<<"total="<<total;
discount=total*0.10;
cout<<"discount"<<discount;
return 0;
}

5) What is the output for the following program segmment
i) int x=20;
   for(int i=5;i<=x;i++)
  {
   cout<<i;
   i=i+4;
  }

  5
  10
  15
  20

ii) int mul=1;
   do
  {
   mul=mul*2;
   cout<<"The mul is:"<<mul;
   mul++;
  }
  while(mul<10)

  1
  3
  7

test :)

) Complete the code that can calculate total marks for 3 students
for(int stud=1;____(a)____;stud++)
{
cout<<"Enter Student name:";
____(b)____name;
for(int mark=1;mark<=3;____(c)____)
{
cout<<"Enter assigment marks:";
cin>>marks;
total=____(d)____+marks;
}
}
cout<<"Total marks are"<<____(e)____;

(a) stud<=3
(b) cin>>
(c) mark++
(d) total
(e) total

2) Based on the short code below :
Change for loop statement below to while loop
for(x=1;x<=5;x++)
cout<<x<<"\t"<<x*2<<"In";

x=1;
while(x<=5)
cout<<x<<"\t"<<x*2<<"In";
x++

3) Write the code using while loop to get the output as below !
    20
    15
    10
    5
 
x=20
while(x<=5)
cout<<" "<<x;
x--;

assgmnt:1

Write a program :
* * * * * * * * * * * * * * * * *
M E S I N T I N M I N U M A N
- - - - - - - - - - - - - - - - -
Jenis                                   RM
- - - - - - - - - - - - - - - - -
1.Pepsi                               1.80
2.Coca Cola                       1.90
3.F&N Orange                  1.50
4.F&N Mirinda                 1.60
5.100 Plus                       2.00
* * * * * * * * * * * * * * * * *
your selection :
Insert your money :

*Your Balance are ________
* Please insert _________ . Your money is not enough !! : _________

Thank You !
Please Come Again

ANSWER :Step 1 :

       

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Steap 5 :

       

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Step 7 :

            

Step 8 : ( bile masukkan duit lebih dpd harga asal )

       

Step 9 :

       

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Step 13 :

       

Step 14 : ( bile masukkan duit kurang dpd harga asal )

       

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