c program to find area of circle
#include <stdio.h>
#define PI 3.142
int main(){
float R, A;
printf("Enter the radius: n");
scanf("%f", &R);
A = PI * R * R;
printf("Area is: %fn", A);
}c program to find area of circle
#include <stdio.h>
#define PI 3.142
int main(){
float R, A;
printf("Enter the radius: n");
scanf("%f", &R);
A = PI * R * R;
printf("Area is: %fn", A);
}c circle area
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#define P 3.1415926535
int main() {
int a, c;
double b;
printf("AREA OF A CIRCLEnnn1: Direct formulan2: Invers formulannChose: ");
scanf("%d", &c);
switch (c)
{
case 1:
printf("nEnter radius value: ");
scanf("%d", &a);
b = a * a * P;
printf("nArea: %fnn", b);
break;
case 2:
printf("nEnter area value: ");
scanf("%d", &a);
b = sqrt(a / P);
printf("nRadius: %fnn", b);
break;
}
if(c != 1 && c != 2)
{
printf("The value is not acceptednn");
}
system("pause");
}Copyright © 2021 Codeinu
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