Rwkj 1354 circle perimeter and area

C ++: class and object 2 (circumference and area of the circle)
Time limit (Common/Java): 1000 ms/3000 Ms running memory limit: 65536 Kbyte
Total submissions: 1038 pass the test: 524

Description

Write a program using the class, enter the radius of the circle, and calculate and display the circumference and area of the circle. Circumference rate: 3.14

Input

The input contains N groups of test instances. Row 1st is the number of test groups.

Row 10-row n + 1 test data. Each group of test data has a real number, indicating the radius of the circle.

Output

The circumference and area of the circle (retain 2 decimal places ).

Sample Input

3
4.5
14.6
5.5

Sample output

28.26 63.59
91.69 669.32
34.54 94.98

 

 

 

# Include <iostream. h>
# Include <iomanip. h>
Class circle
{
Double R;

Public:
Circle (Double X)
{R = x ;}

Void disp ()
{
Cout <fixed <setprecision (2 );
Cout <3.14 * r * 2 <"" <3.14 * r <Endl;
}
};

Int main (INT argc, char * argv [])
{
Int N;
Double R;

Cin> N;

While (n --)
{
Cin> r;
Circle C (R );
C. disp ();
}
}

 

**************************************** * ************* 8

 

# Include <iostream. h>
# Include <iomanip. h>
Class circle
{
Double R, C, S;

Public:
Circle (Double X)
{R = x; C = 3.14 * r * 2; S = 3.14 * r ;}

Void disp ()
{
Cout <fixed <setprecision (2 );
Cout <C <"<S <Endl;
}
};

Int main (INT argc, char * argv [])
{
Int N;
Double R;

Cin> N;

While (n --)
{
Cin> r;
Circle C (R );
C. disp ();
}
}