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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct triangle{
  5.  
  6. int a;
  7. int b;
  8. int c;
  9.  
  10. }ET={5,5,5};
  11.  
  12. int main(void) {
  13.  
  14. double s = 0;
  15. double size = 0;
  16.  
  17. s = ET.a+ET.b+ET.c;
  18. s = s/2;
  19.  
  20. size = s*(s - ET.a)*(s - ET.b)*(s - ET.c);
  21. size = sqrt(size);
  22.  
  23. printf("a = %d",ET.a);
  24. printf("b = %d",ET.b);
  25. printf("c = %d",ET.c);
  26. printf("size = %lf",size);
  27.  
  28. return 0;
  29. }
  30.  
Success #stdin #stdout 0.01s 5228KB
stdin
Standard input is empty
stdout
a = 5b = 5c = 5size = 10.825318