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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct {
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. }Triangle;
  9.  
  10. double Area(Triangle t) {
  11. 	double s = (t.a + t.b + t.c)/2;
  12. 	double area = sqrt(s*(s - t.a)*(s - t.b)*(s - t.c));
  13. 	return area;
  14. }
  15.  
  16. int main(void) {
  17. 	Triangle t;
  18. 	scanf("%lf", &t.a);
  19. 	scanf("%lf", &t.b);
  20. 	scanf("%lf", &t.c);
  21.  
  22. 	double area = Area(t);
  23. 	printf("三角形の辺 a: %.2lf\n", t.a);
  24. 	printf("三角形の辺 b: %.2lf\n", t.b);
  25. 	printf("三角形の辺 c: %.2lf\n", t.c);
  26. 	printf("三角形の面積: %.2lf\n", area);
  27.  
  28. 	return 0;
  29. }
Success #stdin #stdout 0.01s 5280KB
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stdin
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5
5
5
stdout
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三角形の辺 a: 5.00
三角形の辺 b: 5.00
三角形の辺 c: 5.00
三角形の面積: 10.83
https://ideone.com/gZl49M
language:
C99 (gcc 8.3)
created:
11 days ago
visibility:
public

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