Question

Write C-program to find area of circle.

Answer 1

include < stdio.h >

#include < conio.h > #define PI 3.141

int main()

{

float radius, area;

printf("Enter radius of circle\n");

scanf("%f", & radius);

area = PI * radius * radius;

printf("Area of circle : %0.4f\n", area);

getch();

return 0;

}

Answer 2

Answer:

#include<constream.h>

void main()

{

clrscr();

float area,radius;

cout<<"\n Enter radius:";

cin>>radius;

area = 3.14*radius*radius;

cout<<"\n Area of circle ="<<radius;

getch();

}