37
1 Introduction to Algorithms and Programming (COMP151L) A Student's Manual for Computer Lab Works Dr. Mohamed Aissa [email protected] Room 11 i 13 Summer 2015
1
Introduction to Algorithms and
Programming (COMP151L)
A Student's Manual for Computer Lab Works
Dr. Mohamed Aissa [email protected]
Room 11 i 13
Summer 2015
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work #2
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 2 Assignment Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
3
Lab Work #2 Adding Integers
Related Chapter Chapter Title
2 Introduction to C++ Programming
STUDENT LEARNING OUTCOMES:
Upon completion of this computer lab, a successful student will be able to:
Draw a flowchart to find the sum of two numbers,
Understand the assign operator,
Write a program in C++ to find the sum of two integers based on the previous flowchart
Understand the compilation errors and correct them.
1. Write an algorithm to find out the sum of 2 integer numbers:
Lab Questions
stionsExercise
Lab Work # 2 Assignment Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
4
Flowchart
Lab Work # 2 Assignment Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
5
Exercise 1
The following program contains some errors. Fix these errors and obtain an executable
program.
\\ Program to calculate the sum of two integers
# include <iostream>
using namespace
int main
int a,b
{
cout >> " Input a ">>end
cin<<a;
cout << " Input b "<<endl;
cin<<b;
s=a+b
cout << " The sum of a and b = " s<<endl;
return (0)
}
Lab Work # 2 Assignment Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
6
Exercise 2
a) Change the type of the two numbers to float and then make the suitable changes if it is
necessary.
b) Initialize a and b with a number different at zero.
c) Re-execute your program.
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work #3
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 3 If Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
8
Lab Work #3 Conditional Structures
Related Chapter Chapter Title
4 Control Structures
STUDENT LEARNING OUTCOMES:
Upon completion of this computer lab, a successful student will be able to:
draw a flowchart to calculate the value of a given function containing conditions,
translate the flowchart into a C++ program,
understand compilation errors and correct them.
1. Suppose the following function:
( ) {
1. Draw the flowchart to calculate ( ) 2. Based on the flowchart, write the C++ program.
Questions
stionsExercise
Lab Work # 3 If Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
9
#include <iostream>
using namespace std;
int main( )
{
int x;
int f;
cout <<"Input x "<<endl;
cin>>x;
f=0;
if (x>=0)
f= x;
else
f= -x;
cout << " x = "<<x<<endl;
cout << " f="<<f<<endl;
return (0);
}
𝑥 𝑓
𝑓
START
yes
𝑓 𝑥
END
𝑥 𝑓
𝑥
𝑓 𝑥
no
Lab Work # 3 If Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
10
2. Suppose the following function:
( ) {
a. Draw the flowchart to calculate ( ) b. Based on the flowchart, write the C++ program.
#include <iostream>
using namespace std;
int main()
{
int f;
int x;
cout <<"Input x "<<endl;
cin>>x;
f=0;
if (x%2==0)
f=4*x;
else
f=3*x;
cout << " x = "<<x<<endl;
cout << " f="<<f<<endl;
return (0);
}
𝑥 𝑓
𝑓
START
yes
𝑓 𝑥
END
𝑥 𝑓
𝑥%2
𝑓 𝑥
no
Lab Work # 3 If Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
11
3. Suppose the following function:
( ) {
c. Complete the following flowchart to calculate ( ) d. Based on the flowchart, write the C++ program.
#include <iostream>
using namespace std;
int main()
{
int f;
int x;
cout <<"Input x "<<endl;
cin>>x;
f=0;
if ( )
f= ;
else
if( )
f= ;
else
f= ;
cout << " x = "<<x<<endl;
cout << " f = "<<f<<endl;
return (0);
}
𝑥 𝑓
𝑓
START
yes
END
no
yes
no
𝑥 𝑓
Lab Work # 3 If Statements
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
12
4. Suppose the following function:
( ) {
e. Complete the following flowchart to calculate ( ) f. Based on the flowchart, write the C++ program.
#include <iostream>
using namespace std;
int main()
{
int f;
int x;
cout <<"Input x "<<endl;
cin>>x;
f=0;
if (x<=1)
f=1;
else
if( )
f= ;
else
if( )
f= ;
else
f= ;
cout << " x = "<<x<<endl;
cout << " f="<<f<<endl;
return (0);
}
𝑥 𝑓
𝑓
START
yes
END
no
𝑥 𝑓
no
no
yes
yes
Dr. Mohamed Aissa Lab Work # 4 COMP151L Introduction to Algorithms and Programming
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work #4
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 4 Looping Structures
Dr. Mohamed Aissa Lab Work # 4 COMP151L Introduction to Algorithms and Programming
14
Lab Work #4 Looping Structures
Related Chapter Chapter Title
4 Control Structures
STUDENT LEARNING OUTCOMES:
Upon completion of this lab work, a successful student will be able to:
draw a flowchart containing a loop,
understand the different looping structures in C++,
translate the flowchart into a C++ program and write three C++ programs using the three
loop structures,
understand compilation errors and correct them.
1. Draw a flowchart to calculate the following integer summation:
∑
( )
2. Based on this flowchart, write the following C++ program using for loop and test it.
3. Modify the previous program using while, and do while loops. Test both programs.
*** Good Luck ***
Questions
stionsExercise
Lab Work # 4 Looping Structures
Dr. Mohamed Aissa Lab Work # 4 COMP151L Introduction to Algorithms and Programming
15
// Summation of integer numbers included between 1 and n
using for loop
#include <iostream>
using namespace std;
int main()
{
int sum= 0;
int number=1, n;
cout << " Input a positive integer number : "<<endl;
cin>>n;
for(number=1;number<= n;number++)
sum += number;
cout << "\n Sum of numbers includeded between 1 and
" <<n<<" = "<<sum<<endl<<endl;
return (0); // indicate program ended successfully
}
𝑛
𝑠
START
yes
END
𝑛 𝑠
𝑖 𝑛
no
𝑖
𝑠 𝑠 𝑖
𝑖 𝑖
Lab Work # 4 Looping Structures
Dr. Mohamed Aissa Lab Work # 4 COMP151L Introduction to Algorithms and Programming
16
// Summation of integer numbers included between 1
and n using while loop
// Summation of integer numbers included between 1
and n using do while Loop
Lab Work # 4 Looping Structures
Dr. Mohamed Aissa Lab Work # 4 COMP151L Introduction to Algorithms and Programming
17
Solution
// Summation of integer numbers included between 1
and n using while loop
// Summation of integer numbers included between 1
and n using do while Loop
#include <iostream>
using namespace std;
int main()
{
int sum= 0;
int number=1, n;
cout << " Input a positive integer number :
"<<endl;
cin>>n;
while ( number <= n)
{
sum += number;
number++;
}
cout << "\n Sum of numbers includeded
between 1 and " <<n<<" = "<<sum<<endl<<endl;
return (0);
}
#include <iostream>
using namespace std;
int main()
{
int sum= 0;
int number=1, n;
cout << " Input a positive integer number : " <<endl;
cin>>n;
do
{
sum += number;
number++;
}
while(number<=n);
cout << "\n Sum of numbers includeded between 1
and " <<n<<" = "<<sum<<endl<<endl;
return (0);
}
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work #5
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 5 One-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
19
Lab Work #5 One-Dimensional Arrays
Related Chapter Chapter Title
5 Arrays
STUDENT LEARNING OUTCOMES:
Upon completion of this lab work, a successful student will be able to:
write a program to input the elements of one-dimensional array,
write a program to output the elements of one-dimensional array,
draw a flowchart to find the sum of the elements of one-dimensional array,
translate the flowchart into a C++ program,
understand program errors and correct them.
1. Write the following program to input the elements of one-dimensional array:
// Input the elements of one-dimensional array
#include <iostream>
using namespace std;
main()
{
int a[5];
int i;
// Input Array Elements
cout << "\n Iutput Data "<< "\n";
cout << endl;
for ( i=0; i<5; i++)
{
cout << "a[" << i <<"]: ";
cin >> a[i];
}
return( 0);
}
Questions
stionsExercise
Lab Work # 5 One-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
20
2. Add to the previous program one loop to output the elements of one-dimensional
array:
// Input and output the elements of one-dimensional array
#include <iostream>
using namespace std;
main()
{
int a[5];
int i;
// Input Array Elements
cout << "\n Iutput Data "<< "\n";
cout << endl;
for ( i=0; i<5; i++)
{
cout << "a[" << i <<"]: ";
cin >> a[i];
}
// Output Array Elements
return( 0);
}
Lab Work # 5 One-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
21
3. Draw a flowchart to find the sum of the elements of one-dimensional array.
Lab Work # 5 One-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
22
4. Based on the previous flowchart, write a program to find the sum of the elements of
one dimensional array.
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work
#6
Two-Dimensional Arrays
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
24
Lab Work #6 Two-Dimensional Arrays
Related Chapter Chapter Title
5 Arrays
STUDENT LEARNING OUTCOMES:
Upon completion of this lab work, a successful student will be able to:
write a program to input the elements of two-dimensional array,
write a program to output the elements of two-dimensional array,
draw flowcharts to process the elements of two-dimensional array,
translate the flowcharts into C++ programs,
understand program errors and correct them.
5. Write the following program (Program1) to input the elements of two-dimensional
array:
// Input the elements of two-dimensional array
#include <iostream>
using namespace std;
main()
{
int a[3][2];
int i,j;
// Input Array Elements
cout << "\n Iutput Data "<< "\n";
cout << endl;
for ( i=0; i<3; i++)
for ( j=0; j<2;j++)
{
cout << "a[" << i <<","<< j <<"]: ";
cin >> a[i][j];
}
return(0);
}
Questions
stionsExercise
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
25
6. Add to the previous program (Program1) one loop to output the elements of two-
dimensional array:
// Input and output the elements of two-dimensional array
#include <iostream>
using namespace std;
main()
{
int a[3][2];
int i,j;
// Input Array Elements
cout << "\n Iutput Data "<< "\n";
cout << endl;
for ( i=0; i<3; i++)
for ( j=0; j<2;j++)
{
cout << "a[" << i <<","<< j <<"]: ";
cin >> a[i][j];
}
return(0);
}
// Output Array Elements
return( 0);
} (Program2)
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
26
7. Draw a flowchart to find the sum of the elements of two-dimensional array A(m,n).
∑ ( )
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
27
8. Based on the previous flowchart, extend the previous program to find the sum of the
elements of two-dimensional array.
(Program3)
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
28
9. Extend the previous flowchart such if finds the sum of positive and negative elements
of two-dimensional array A(m,n).
∑ ( )
, if ( )
∑ ( )
, if ( )
Lab Work # 6 Two-Dimensional Arrays
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
29
10. Extend the previous program such that it calculates the sum of positive elements and
the sum of negative elements of two-dimensional array.
(Program4)
*** Good Luck ***
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work
#7
Functions
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 7 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
31
Lab Work #7 Functions
Related Chapter Chapter Title
6 Functions
STUDENT LEARNING OUTCOMES:
Upon completion of this lab work, a successful student will be able to:
draw a flowchart to find the factorial of a positive integer,
declare a function,
call a function,
define a function,
write a program to declare, call and define a function to calculate the factorial of a positive
integer
understand program errors and correct them.
1. Draw a flowchart to calculate the factorial of a positive integer:
( )
2. Write a program using a function. The program is to print the factorial for a given integer
number n. You should have a function to calculate the factorial of that introduced number.
The main program coordinates the process of inputting values and calling this function as
necessary.
Questions
stionsExercise
Lab Work # 7 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
32
1. Flowchart
START
yes
no
Fact=1
Fact=1
Fact=Fact*I
I=I+1
N <I
no
END
N, Fact
N=0 yes
N
Lab Work # 7 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
33
2. Program
// Function prototypes
#include <iostream>
using namespace std;
double factorial(int);
int main( )
{
int n;
double result;
cout << "Enter a value for n: ";
cin >> n;
result = factorial(n);
cout << "\n The factorial of n is " << result<< endl;
return(0);
}
double factorial(int m)
{
int i;
double fact;
fact=1;
if (m==0)
{
fact=1;
return(fact);
}
for (i=1;i<=m;i++)
fact=fact*i;
return(fact);
}
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
Introduction to Algorithms and
Programming / Lab
(COMP151L)
Lab Work
#8
Functions
Student Name ID
Dr. Mohamed Aissa
Office # 11 i 13
Summer 2015
Lab Work # 8 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
35
Lab Work #8 Functions
Related Chapter Chapter Title
6 Functions
STUDENT LEARNING OUTCOMES:
Upon completion of this lab work, a successful student will be able to:
declare a function,
call a function,
define a function,
write a program to declare, call and define function.
1. Write a main program calling a function. In the main program, the user should input the
dimension of the rectangle (length and width). The main program should call a function
"rectangle" to calculate the perimeter of the rectangle which should be printed by the
main program.
Questions
stionsExercise
Lab Work # 8 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
36
Program
Lab Work # 8 Functions
Dr. Mohamed Aissa Student's Lab Works COMP151L Summer 2015
37
2. Add a another function to calculate the area of the rectangle. Again, the main program
should call this function and then print the area.
