This document contains 7 programs written in C++. Program 1 calculates the circumference and area of a circle given the radius. Program 2 acts as a basic calculator, performing addition, subtraction, multiplication and division. Program 3 converts temperatures between Celsius and Fahrenheit. Program 4 calculates the square of an integer. Program 5 calculates student marks, percentage, average from subject marks. Program 6 demonstrates variable increment/decrement. Program 7 prints a pattern using tabs and plus symbols.

1. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#1
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
int rad;
float pi=3.14;
cout<<”Enter The Value of Radius=”;
cin>>a;
cout<<”Circumfrance of Circle is =”<<2*(pi*rad)<<endl;
cout<<”Area of Circle is =”<<pi*(rad*rad)<<endl;
getche();
}

2. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#2
#include<iostream>
#include<conio.h>
Using namespace std;
Int main()
{
int a,b;
cout<<”**************************”;
cout<<”tCalculator”;
cout<<”**************************”;
cout<<”Enter First Value=”;
cin>>a;
cout<<”Enter Second Value=”;
cin>>b;
cout<<”Result of Addition Operation Is =”<<a+b<<endl;
cout<<”Result of Subtraction Operation Is =”<<a-b<<endl;
cout<<”Result of Multiplication Operation Is =”<<a*b<<endl;
cout<<”Result of Divisionion Operation Is =”<<a/b<<endl;
getche();
}

3. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#3
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
int ctemp;
float ftemp;
cout<<”Enter Temperature in Celcius=”;
cin>>ctemp;
ftemp=ctemp*(9/5+32);
cout<<”Temperature in Farhenheight=”<<ftemp<<endl;
getche();
}

4. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#4
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
int a;
cout<<”Enter Integer Value=”;
cin>>a;
cout<<”Square of Integer is =”<<a*a<<endl;
getche();

5. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#5
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
int s1,s2,s3s4,s5,avg,tot,obt;
float per;
cout<<”Enter First Subject Marks=”;
cin>>s1;
cout<<”Enter Second Subject Marks=”;
cin>>s2;
cout<<”Enter Third Subject Marks=”;
cin>>s3;
cout<<”Enter Fourth Subject Marks=”;
cin>>s4;
cout<<”Enter Fifth Subject Marks=”;
cin>>s5;
cout<<”Enter Total Marks=”;
cin>>tot;

6. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
obt=s1+s2+s3+s4+s5;
cout<<”Your Obtained Marks are”<<obt<<endl;
per=(obt*100)/tot;
cout<<”Your Percentage is=”<<per<<endl;
avg=obt/5;
cout<<”Your Average is=”<<avg<<endl;
getche();
}

7. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#6
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
int a=10;
cout<<a<<endl;
a=a+a;
cout<<a<<endl;
a--;
cout<<a<<endl;
getche();
}

8. Quaid-e-Awam University of Engineering Science & Technology
Nawabshah
OOP(Object Oriented Programming)
Lab#2
Program#7
#include<iostream>
#include<conio.h>
Using namespace std;
int main()
{
cout<<”CCCCCCCCCC”<<”t++t”<<”t++”<<endl;
cout<<”CCt”<<”t++t”<<”t++”<<endl;
cout<<”CCt” ++++++++++++++”<<” ++++++++++++++”<<endl;
cout<<”CCt” ++++++++++++++”<<” ++++++++++++++”<<endl;
cout<<”CCt”<<”t++t”<<”t++”<<endl;
cout<<”CCCCCCCCCC”<<”t++t”<<”t++”<<endl;
getche();
}