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  1.  
  2. #include <stdio.h>
  3. #include <math.h>  
  4.  
  5. typedef struct {
  6.     double a;
  7.     double b;
  8.     double c;
  9. } Triangle;
  10.  
  11. double calculate(Triangle d) {
  12.     double s = (d.a + d.b + d.c) / 2;
  13.     double area = sqrt(s * (s - d.a) * (s - d.b) * (s - d.c));
  14.     return area;
  15. }
  16.  
  17. int main() {
  18.     Triangle d;
  19.  
  20.     scanf("%lf", &d.a);
  21.     scanf("%lf", &d.b);
  22. 	scanf("%lf", &d.c);
  23.  
  24.     double area = calculate(d);
  25.  
  26.     printf("a: %.lf\n", d.a);
  27.     printf("b: %.lf\n", d.b);
  28.     printf("c: %.lf\n", d.c);
  29.     printf("三角形の面積: %lf\n", area);
  30.  
  31.     return 0;
  32. }
  33.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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5
5
5
stdout
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a: 5
b: 5
c: 5
三角形の面積: 10.825318
https://ideone.com/jZj6ZL
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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