Question

Hi guys just starting out programming and my professor doesn't really explain it that much can you help me with this lab of mine in c++ and yes I'll give you points for it thank you!

Lab #1

/Part A:
//Input number 1 (store in var1)
//Input number 2 (store in var2)
//Swap them, so number 1 is in var2 and number 2 is in var1
//Output the numbers to stdout (cout)
//Multiply var1 by 2
//Divide var2 by 2
//Output the results again (cout)

//Part B:
//Take as input a radius of a circle from the user (cin)
//Output the circumference of the circle and area of the circle (cout)

//Part C:
//Goal: Refresh int, floats, chars, strings.
//Take as input a quantity of fruits (number of apples) (cin)
//Take as input price per apple
//Output the total price for all apples bought

//Part D:
//Take as input the name of a student (cin)
//Take as input the grade she got in a course (cin)
//Output the name and the grade (cout)

//Part E:
//Goal: test comparison operators and multiple cases of variable values
//Take as input a grade (A B C D or F)
//Output a description of the grade (what it means "Excellent" or ... "Failed")
//Take as input a year of graduation (2000)

Part A:

Code:

#include <iostream>

using namespace std;

int main()
{
int var1,var2;
cout<<"Input the numbers : Number 1 : ";
cin>>var1;//input number1
cout<<"Number 2 : ";
cin>>var2;//input number2
int temp;//to store 1 number temprorily
temp=var1;
var1=var2;
var2=temp;//it now has value of var1
cout<<"Number 1 : "<<var1<<" Number 2 : "<<var2;
var1=var1*2;
var2=var2*2;
cout<<"\nNumber 1 : "<<var1<<" Number 2 : "<<var2;// \n is for new line

return 0;
}

Output:

Input the numbers : Number 1 : 1

Number 2 : 2

Number 1 : 2 Number 2 : 1

Number 1 : 4 Number 2 : 2

PART B

Code:

#include <iostream>

using namespace std;

int main()
{
int r;
cout<<"Input radius of circle : ";
cout<<"\nCircumference is : "<<2*3.14*r;
cout<<"\nArea is : "<<3.14*r*r;

return 0;
}

Output:

Input radius of circle : 5

Circumference is : 31.4

Area is : 78.5

PART C

Code:

#include <iostream>

using namespace std;

int main()
{
int quantity;
float price;
cout<<"Enter quantity of apples : ";
cin>>quantity;//input quantity
cout<<"Enter price per apple : \$";
cin>>price;//input price
cout<<"Total price of apples bought : \$"<<quantity*price;

return 0;
}

Output:

Enter quantity of apples : 7

Enter price per apple : \$33.2

Total price of apples bought  : \$232.4

PART D

Code:

#include <iostream>

using namespace std;

int main()
{
string name;//name must be string type
cout<<"Enter name of student : ";
cin>>name;
cout<<"Enter grade of student : ";

return 0;
}

Output:

Enter name of student : John

Enter grade of student : A

Name : John

PART E

Code:

#include <iostream>

using namespace std;

int main()
{

cout<<"Enter grade of student : ";
cout<<"\nExcellent";
cout<<"\nVery Good";
cout<<"\nGood";
cout<<"\nAverage";
else
cout<<"\nFailed";
int year;
cout<<"\nEnter a year of education :";
cin>>year;
if(year+4<2019)//assuming current year is 2019 and 4 years are for graduation
else

return 0;
}

Output:

Enter grade of student : A

Excellent

Enter a year of education :2018

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