C++ help for a beginner

I am VERY new to C++ and was wondering if someone could help me write this program. I am trying to find the area and perimeter of a rectangle. The length is 10 and the width is 12. Area = length * width (i am presuming) and Permiter would = 2 * length + 2 * width.

would it be like?

length = 10;
width = 12
area = length * width;
perimeter = 2 * lenght + 2 * width;
cout<<"length * width"<<endl;
cout<<"2 * length + 2 * width<<endl

Please help!! Thanks, Mike

hazda (14)

try using this code

#include <iostream>
#include <conio.h>
using namespace std;                    //declare this so that you should be able to use "cout" and "cin"

int main()                              //this an important fucntion
{
    int length = 10;
    int width = 12;
    int Area = length * width;
    int Perimeter = 2*length + 2*width;
    
    cout << "Area = " << Area <<endl;
    cout << "Perimeter = " << Perimeter;
    
    getch();
    return 0;
}

can anyone else please try to explain to mike?????

Last edited on

chris (82)

Firstly you would need to include the "<iostream>" header, for the output functions, & "conio.h" for the getch function
Next "using namespace std;" for using functions within the namespace "std" without having to write std::func_name.
Declare the "main" function of the program, which returns an integer, so is done using the integer keyword. "int main() { ... }"
Then we need to declare the length, width, area & perimeter of the rectangle, in this example they are all whole numbers (integers), so we use the "int" keyword, then use "=" to set a value to them.
The cout function then prints text within "quotation marks" or variables without quotation marks.
The variable endl is for a newline.
Use the getch function to wait for user to press enter.
Return 0, as the main function returns an integer.

mykel3227 (5)

hazda and chris thanks for all the help and explanations.

I came up with this, and it worked...Thanks again!

#include<iostream>
using namespace std;

int main()
{

int length;
int width;
int area, perimeter;

cout<<"Please enter the length: ";
cin>>length;
cout<<"Please enter the width: ";
cin>>width;
return 0;

perimeter=2*length+2*width;
area=length*width;
cout<<"The area is "<<area<<endl;
cout<<"The perimeter is "<<perimeter<<endl;
return 0;
}

Then after i compiled it and executed it, i got a prompt to enter the length and width....Worked like gold! Thanks again!

Last edited on

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