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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	#include <stdio.h>
  5. #include <math.h>  
  6.  
  7. typedef struct {
  8.     double a;
  9.     double b;
  10.     double c;
  11. } Triangle;
  12.  
  13. double calculate_area(Triangle t) {
  14.  
  15.     double s = (t.a + t.b + t.c) / 2;
  16.     double area = sqrt(s * (s - t.a) * (s - t.b) * (s - t.c));
  17.     return area;
  18. }
  19.  
  20. int main() {
  21.     Triangle t;
  22.  
  23.     printf("a: ");
  24.     scanf("%lf", &t.a);
  25.     printf("b: ");
  26.     scanf("%lf", &t.b);
  27.     printf("c: ");
  28.     scanf("%lf", &t.c);
  29.  
  30.     double area = calculate_area(t);
  31.  
  32.     printf("a: %.0f\n", t.a);
  33.     printf("b: %.0f\n", t.b);
  34.     printf("c: %.0f\n", t.c);
  35.     printf("三角形の面積: %.6f\n", area);
  36.  
  37.     return 0;
  38. }
  39.  
  40. 	return 0;
  41. }
  42.  
Success #stdin #stdout 0s 5272KB
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https://ideone.com/jiaFR6
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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