**C program for area of circle**

#include <stdio.h>

#define PI 3.141

int main(){

float r, a;

printf("Radius: ");

scanf("%f", &r);

a = PI * r * r;

printf("%f\n", a);

return 0;

}

**Mathematical formula for area of circle:**

Here
Pie is constant which is equal to

Pie = 22/7 or
3.14159265358979323846264338327950288419716939937510...

Radius
is radius of the circle.

7. Write a c program to find the area of rhombus.

8. Write a c program to find the area of parallelogram.

This program is easy to understand..

ReplyDeleteThere are a few things wrong with this.

ReplyDeleteFirst, it's spelled "pi"

Second, 22/7 is not equal to "pi"

when the %f\n derived

ReplyDeletewhy use %f\n instead of %f

ReplyDelete\n for space

Delete\n is used to print after some space... aksh

ReplyDeletesome escape sequences unnecessary

ReplyDeleteI planing to write algorithm part of my project work question is following

ReplyDeleteproblem is finding intersection of between two ellipses

(x-x1)^2/a^2+(y-y1)^2/b^2=1,(x-x2)^2/c^2+(y-y2)^2/d^2=1 (x1,y1),(x2,y2) point of ellipse and a,b,c,d are major and minor axis of ellipses

please provide any idea of how to find out intersection of two ellipses