Sunday, March 27, 2011
EXERCISE BEFORE MIDTERM
1) Change the if...else to swicth case ... statement
#include<iostream.h>
main( )
{
int nomA,nomB,selesction,value;
cout<<"Enter 2 numbers :";
cin>>nomA>>nomB;
cout<<"1.addition";
cout<<"2.substraction";
cout<<"3.multiply";
cout<<"4.divison";
cout<<"enter selection";
cin>>selection;
{
if(seletion==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
}
return0;
}
ANSWER:
#include<iostream.h>
main( )
{
int nomA,nomB,selesction,value;
cout<<"Enter 2 numbers :";
cin>>nomA>>nomB;
cout<<"1.addition";
cout<<"2.substraction";
cout<<"3.multiply";
cout<<"4.divison";
cout<<"enter selection";
cin>>selection;
{
//swicth ...case statement
(swictth selection)
{case1:nomA+nomB;break;
case2:nomA-nomB;break;
case3:nomA*nomB;break;
case4:nomA/nomB;break;
default:cout<<"invalid selection";
cout<<"The value is: " <<value;
}
return0;
}
2)Change for loop below to while loop
#include<iostream.h>
main( )
{
int i,power2;
for(i:1;i<9;i++)
{
power2=i*i;
cout<<" " <<i<<"power2"<<power2;
}
}
ANSWER:
#include<iostream.h>
main( )
{
int i,power2;
//While
i=1;
while(i<=9)
{
power2=i*i;
cout<<" "<<i<<"power2"<<power2;
i++;
}
}
3)Write a program that input 2 numbers . compare the numbers and display only the biggest number . If the number are same display "the number are same"
#include<iostream.h>
{
main()
int num1,num2
cout<<"enter an integer";
cin>>num;
//if (num2>num1)
{cout<<"num2 is bigger than num1;}
ele if (num2==num1)
cout<<"num2 is same as num 1";
else
{cout<<"invalid ";}
return0;
}
4.write a program using for loop hat receive prices of 3 products, calculate the price that must be paid after 16% 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;
dicount=total *0.01;
cout<<"discount"
return0;
}
5. what is the output for following program
a) intx=20
for (int i=5,i<=x,i++)
{
cout<< i;
}
answer: i =5,10,15,20
b) int mul=1
do
{
mul=mul*2;
cout<<"the mul is :" <<mul;
mul++;
while (mul10)
answer : mul = 1 ,3, 7
FOP CHAPTER 6
TOPIC : LOOP&WHILE
LOOP
#include<iostream.h>
main( )
{
//declare variable
//get input
cout<<"enter integer";
cin>>x;
//loop for
for(y=0:y<xy:y++)
{
cout<<" "x;
}
WHILE
#include<iostream.h>
main( )
int x,y;
cout<<"enter an integer";
cin>>x;
//while(y<x)
cout<<" "<<x;
y++;
}
}
ASSINGMENT 1
Instruction : write a program
**********************************
MESIN TIN MINUMAN
-----------------------------------------------
JENIS RM
-----------------------------------------------
1. PEPSI 1.80
2. COCA COLA 1.90
3. FS ORANGE 1.50
4. FS MIRINDA 1.60
5. 100 PLUS 2.00
*********************************
EXECISE 2 MAR 2011
1) a - initializing variable pie with the value 3.14
answer : float pie = 3.14
b- declare a variable and perimeter with double data type
answer : Double perimeter ;
c- give instruction that allowed user to input data
answer : cout << " enter your data " ;
cin >> data ;
d- input number of computer using variable
answer : cout << " enter computer number " ;
cin >> number ;
2) change else statement to swicth..case
#include <iostream.h>
main ( )
{
int selection , quantity ;
float price ;
cout << "1.pen = rm 0.50" ;
cout<< "2.pencil = rm 0.30";
cout<< "3.ruler = rm0.20";
cout<< "4.eraser=rm0.10';
cin>>selection;
cin>>quantity;
if (selection==1)
{price = quantity*0.20}
else if (selection ==2)
{price = quantity*0.30}
else if (selection ==3)
{price = quantity*0.20}
else if (selection ==4)
{price = quantity*0.10}
else
{cout << "invalid seletion" ;}
cout<< "the price is : " << price ;
return 0;
}
answer :
#include <iostream.h>
main ( )
{
int selection , quantity ;
float price ;
cout << "1.pen = rm 0.50" ;
cout<< "2.pencil = rm 0.30";
cout<< "3.ruler = rm0.20";
cout<< "4.eraser=rm0.10';
cin>>selection;
cin>>quantity;
swicth (selection)
{
case 1 : price=quantity*0.50;break;
case 2 : price=quantity*0.30;break;
case 3 : price=quantity*0.20;break;
case 4 : price=quantity*0.10;break;
default : cout << "invalid selection";
}
cout << the price is : " << price;
return 0;
}
FOP CHAPTER 5
STUDY DATE : 2 MAR 2011
TOPIC : IF ELSE ... SWICTH CASE......
EXAMPLE :
AGE = GENERATION
1-6 = kids
7-12 = child
13-21 = teenagers
22-30 = adult
> 31 = old
if ..... else
#include <iostream.h>
main ( )
{
declare variable
int age ;
// input
cout << " enter your AGE : " ;
cin >> age ;
//if else statement
if (age > = 1 II age <=6)
{cout << " you are kids ! " ;
else if ( age >=7 II age < = 12 )
{cout << '" you are child ! " ;
else if ( age >=13 II age <=21 )
{cout << " you are teenagers ! " ;
else if ( age <=22 II age <=30 )
{cout << " you are adult ! " ;
else if ( age > 30 )
{cout << " you are old ! " ;
else
{cout << "invalid selection" , ;
return 0 ;
}
swicth...case
#include < iostream.h>
main ( )
//declre variable
int age ;
//input
cout << " enter your age : " ;
cin >> age;
// swicth ... case statement
{ case ('age'>=1 II 'age' <= 6) : cout << " you are kids ! " ; break ;
case ( 'age'>=7 II 'age' <=12) : cout << " you are child ! " ; break ;
case ('age'>= 13 II 'age' <= 21) : cout << " you are teengers ! " ; break ;
case ( 'age' >= 22 II 'age' <=30) : cout << "you are adult ! " ; break ;
case ( 'age >30 ) : cout << " you are old ! " ; break ;
default : cout << " invalid selection " ;
}
return 0 ;
}
FOP CHAPTER 4
OPERATORS AND EXPRESSION
1) Arithmetic operators
++ (plus)
-- (minus)
+ (addition)
- (substraction)
* (multiplication)
/ (floating point division / int division)
% (modulus)
2) Increment and decrement in C++
++ (pre-increment) ++m
++ (post-increment) --n
-- (pre-decrement) --n
-- (post-decrement) n--
EXAMPLE 1:
1) a=2 , m=2 , p=2 , x=2 , b=3 , n=3 , q=3 , y=3
question :
(++a) + (--b) * 4> (++m) * ( -- n) + 4
=(2+1) + (3-1) * 4> (2) * (3) + 4
= 3+2* 4> 2*3+4
= 3+8 > 6+4
= 11 > 10
= true/1
3) Reltional operators:-
< less than
> greater than
== equal too
<= less than or equal too
>= greater than or equal too
!= not equal too
4) logical operators
( 0/FALSE = 1/TRUE ) && (AND) {tips if got 0 will be 0/false}
II (OR) { TIPS IF GOT 1 WILL BE 1/TRUE
EXAMPLE :
a=2 , m=2 , p=2 , x=2 , b=3 , n=3 , q=3 , y=3
++ a + --b * 4 > ++m * --n +4 && p++ + q -- * 4 < x++ * y-- + 4
(2+1)+(3-1)*4 > (2+1)*(3-1)+4 && 2+3*4 < 2*3+4
3 + 2 * 4 > 3 * 2 +4 && 2 + 12 < 6+4
11 > 10 && 14 < 10
1/true && 0/false
0/false
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