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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 calculate_area(Triangle t) {
  11.     double p = (t.a + t.b + t.c) / 2;
  12.     return sqrt(p * (p - t.a) * (p - t.b) * (p - t.c));
  13. }
  14.  
  15. int main() {
  16.     Triangle t;
  17.  
  18.     scanf("%lf", &t.a);
  19.     scanf("%lf", &t.b);
  20.     scanf("%lf", &t.c);
  21.  
  22.     double area = calculate_area(t);
  23.  
  24.     printf(" a : %.2f\n b : %.2f\n c : %.2f\n", t.a, t.b, t.c);
  25.     printf("三角形の面積: %.2f\n", area);
  26.  
  27.     return 0;
  28. }
  29.  
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
5 5 5
stdout 
 a : 5.00
 b : 5.00
 c : 5.00
三角形の面積: 10.83
https://ideone.com/ZS0pcV
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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