Simple exercises on C++ programming

1. SJEM2231 STRUCTURED PROGRAMMING
NAME : WAN MOHAMAD FARHAN BIN AB RAHMAN
TUTORIAL 1/ LAB 1 (22nd SEPTEMBER 2014)
QUESTION 1
Write a program to print the word “Welcome”.
#include <iostream>
using namespace std;
int main()
{
cout << "Welcome n";
return 0;
}
//Output :
Welcome
QUESTION 2
Write a program to print a sentence in a single line and in three lines as like below.
Hello, welcome to C++ Programming and
Hello,
welcome to
C++ Programming

2. #include <iostream>
using namespace std;
int main()
{
cout << "Hello, welcome to C++ Programming n" ;
return 0;
}
//Output :
Hello, welcome to C++ Programming
#include <iostream>
using namespace std;
int main()
{
cout << "Hello,n welcome ton C++ Programmingn";
return 0;
}
//Output :
Hello,
welcome to
C++ programming

3. QUESTION 3
Write a program that prints the sum, difference and product of two integers. Initialize the integers with the values 14 and 8.
#include <iostream>
using namespace std;
int main()
{
int a,b ;
int sum, difference, product;
a=14;
b=8;
sum= a+b;
difference= a-b;
product= a*b;
cout << sum <<"n";
cout << difference <<"n";
cout << product <<"n”;
return 0;
}
// Output:
22
6
112

4. QUESTION 4
Write a program that prints the sum, difference, product, quotient, and remainder of two numbers that are input interactively.
#include <iostream>
using namespace std;
int main()
{
int a,b;
int sum, diff, product, quotient, remainder;
cout << "Please enter a value of a: " ;
cin >> a;
cout << "Please enter a value of b: " ;
cin >> b;
sum=a+b;
diff=a-b;
product=a*b;
quotient=a / b;
remainder = a%b;
cout << “The sum of a and b is : “ << sum <<"n";
cout << “The difference of a and b is : “ << diff <<"n";
cout << “The product of a and b is : “ << product <<"n";
cout << “The quotient of a and b is : “ << quotient<<"n";
cout << “The remainder of a and b is : “<< remainder<<"n";

5. return 0;
}
//Output :
Please enter a value of a: 34
Please enter a value of b: 27
The sum of a and b is : 61
The difference of a and b is : 7
The product of a and b is : 918
The quotient of a and b is : 1
The remainder of a and b is : 7
QUESTION 5
Write a program to read the floating point number and convert it to integer
//Using truncate method
#include <iostream>
using namespace std;
int main()
{
float x;
int y;
cout<<"Please enter a decimal number : ";
cin >> x;
y=x;
cout<<"The integer number you will get is : "<< y << endl;
return 0;
}

6. //Output_truncate :
Please enter a decimal number : 45.77
The integer number you will get is : 45
//Using round off method directly :
#include <iostream>
#include <cmath>
using namespace std;
double round(double value)
{
return(floor(value+0.5));
}
int main()
{
double x,value;
int y;
write:
cout <<"Please enter a decimal number : ";
cin >>x;
y = round(x);
cout<<"The integer number that you will get after round off is : "<< y<<endl;
cout<<"Do you want to continue with other decimal number? n";
cout<<"Press 1 for Yes ornPress 2 for Nonn";
cin>> value;
if(value==1)

7. {
goto write;
}
else if(value==2)
{
return 0;
}
else
{
cout<<"Error! Please understand the COMMAND!!" <<endl;
goto write;
}
}
//Output_roundoff to integer directly
Please enter a decimal number : 56.44
The integer number that you will get after round off is : 56
Do you want to continue with other decimal number?
Press 1 for Yes or
Press 2 for No
1
Please enter a decimal number : 1000.87
The integer number that you will get after round off is : 1001
Do you want to continue with other decimal number?

8. Press 1 for Yes or
Press 2 for No
8
Error! Please understand the COMMAND!!
Please enter a decimal number : 194.499
The integer number that you will get after round off is : 194
Do you want to continue with other decimal number?
Press 1 for Yes or
Press 2 for No
2
Press any key to continue
//Round off method by using setprecision() to set the decimal places :
#include <iostream>
#include <cmath> //nothing happened if we eliminate this cmath
#include <iomanip> // Input output manipulator, use setprecision()
using namespace std;
int main()
{
long double x,value;
int y;

9. write:
cout << "Please enter a decimal number : ";
cin >>x;
y = long double (x);
cout<< "The integer number you will get is : ";
cout<< fixed << setprecision (0) << x <<endl;
/* fixed is used before setprecision() to ensure that when we set the setprecision(0), it will round off to integer, if we make setprecision(1), setprecision(2), etc ; it will round off to 1 decimal place ,2 decimal places and so on respectively */
cout<< "Do you want to continue with other decimal number?n";
cout<<"Press 1 for Yes ornPress 2 for Nonn";
cin>> value;
if(value==1)
{
goto write; // goto (statement);
}
else if(value==2)
{
return 0;
}
else
{
cout<< "Error! Please understand the COMMAND!!" <<endl;
goto write;
}
}

10. //Output_round off method using setprecision()
Please enter a decimal number : 454535.435
The integer number you will get is : 454535
Do you want to continue with other decimal number?
Press 1 for Yes or
Press 2 for No
1
Please enter a decimal number : 44.78
The integer number you will get is : 45
Do you want to continue with other decimal number?
Press 1 for Yes or
Press 2 for No
1
Please enter a decimal number : 0.999993
The integer number you will get is : 1
Do you want to continue with other decimal number?
Press 1 for Yes or
Press 2 for No
2