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back to boardanyone can tell me what's wrong? Posted by mon 3 Feb 2002 02:36 thanks...
#include <stdio.h>
#include <math.h>
#define PI 3.1416
int main()
{
double a, r, area;
scanf("%lf%lf", &a, &r);
a /= 2;
if (a >= r) {
printf("%.3f\n", PI * r * r);
return 0;
}
if (r >= sqrt(2) * a) {
printf("%.3f\n", 4 * a * a);
return 0;
}
printf("%.3f\n", PI * r * r - 4 * (acos(a / r) * r * r - a *
sqrt(r * r - a * a)));
return 0;
} I don't know whether <math.h> is allowed,but you can... > thanks...
>
> #include <stdio.h>
> #include <math.h> ??????
You can use integral to calculate the area Instead of using any
mathematic function. I got the answer Posted by mon 3 Apr 2002 12:33 I should use ".3lf" instead of ".3f" in the format string
of printf. but was that AC??? > I should use ".3lf" instead of ".3f" in the format string
> of printf. Re: anyone can tell me what's wrong? Posted by 8P 14 Feb 2010 22:53 #define PI 3.1416 // no
#define PI 3.1415926535897932 //yes Re: anyone can tell me what's wrong? Posted by oybek 17 May 2014 17:54 Better to use standard M_PI
Edited by author 17.05.2014 17:54 |
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