C Program to Calculate Area of Circle
/*********************************************************************
C Program to calculate area of circle
area=pi*r*r
********************************************************************/
#include<stdio.h>
#include<conio.h>
void
main()
{
float pi=3.14;
float r=3.5;
float area;
clrscr();
area=pi*r*r;
printf("The area
of circle is:\t%f\n",area);
printf("End of
program");
}
The area of circle is: 38.465004
End of program
/*********************************************************************
C Program to calculate area of circle
area=pi*r*r
********************************************************************/
#include<stdio.h>
#include<conio.h>
void
main()
{
float r,area;
float pi=3.14;
clrscr();
printf("Enter radius to calculate area of circle\n");
scanf("%f",&r);
area=pi*r*r;
printf("The area of circle is:\t%f\n",area);
printf("End of program");
}
Enter radius to calculate area of circle
2
The area of circle is: 12.560000
End of program
/*********************************************************************
C Program to calculate area of circle
area=pi*r*r
********************************************************************/
#include<stdio.h>
#include<conio.h>
void main()
{
float r,area;
float pi=3.14;
clrscr();
printf("Enter radius to calculate area of circle\n");
scanf("%f",&r);
printf("The area of circle is:\t%f\n",pi*r*r);
printf("End of program");
}
Enter radius to calculate area of circle
2
The area of circle is: 12.560000
End of program
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