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  1. #include <stdio.h>
  2. #define PI 3.14
  3.  
  4. struct ELLipse{
  5. int a;
  6. int b;
  7. };
  8.  
  9. int main(void) {
  10. struct ELLipse data = {5, 2};
  11.  
  12. printf("area : %.lf\n",PI*data.a*data.b);
  13. return 0;
  14. }
  15.  
Success #stdin #stdout 0s 5288KB
stdin
Standard input is empty
stdout
area : 31