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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. // your code goes here
  5. const double pi=3.14159;
  6. double r,circum,area;
  7. scanf("%lf",&r);
  8. circum = 2*pi*r;
  9. area = pi*r*r;
  10. printf("circumference =%f,area= %f\n",circum,area);
  11. printf("circumference =%7.2farea =%7.2f\n",circum,area);
  12. return 0;
  13. }
  14.  
Success #stdin #stdout 0.01s 5284KB
stdin
5.3
stdout
circumference =33.300854,area= 88.247263
circumference =  33.30area =  88.25