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  1. #include <stdio.h>
  2. #include <math.h>
  3. struct t{
  4. 	double a;
  5. 	double b;
  6. 	double c;
  7. } kadai = {5.0, 5.0, 5.0};
  8. int main(void) {
  9. 	double s = (kadai.a + kadai.b + kadai.c)/2;
  10. 	double S = sqrt(s*(s - kadai.a)*(s - kadai.b)*(s - kadai.c));
  11. 	printf("%f",S);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0.01s 5288KB
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10.825318
https://ideone.com/DK1JOG
language:
C99 (gcc 8.3)
created:
3 days ago
visibility:
public

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