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  1. #include<stdio.h>
  2. #include<math.h>
  3. #define  PI 3.141592653589793
  4. int main ()
  5. {
  6. double a,b;
  7. scanf("%lf",&a);
  8. b=2*fabs(cos(a/180*PI))*6371.393*PI;
  9. printf("%.3lf\n",b);
  10. return 0;
  11. }
Success #stdin #stdout 0.01s 5336KB
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Standard input is empty
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40032.643
https://ideone.com/kHA6U5
language:
C (gcc 8.3)
created:
15 hours ago
visibility:
public

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