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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct Triangle {
  5.     double a, b, c;  
  6. };
  7.  
  8. int main() {
  9.     struct Triangle t;  
  10.     double p, s;          
  11.  
  12.     scanf("%lf", &t.a);
  13.     scanf("%lf", &t.b);
  14.     scanf("%lf", &t.c);
  15.  
  16.     p = (t.a + t.b + t.c) / 2;
  17.  
  18.     s = sqrt(p * (p - t.a) * (p - t.b) * (p - t.c));
  19.  
  20.     printf("三角形の3辺の長さ\n");
  21.     printf("a = %.1f\n", t.a);
  22.     printf("b = %.1f\n", t.b);
  23.     printf("c = %.1f\n", t.c);
  24.     printf("面積 s = %.1f\n", s);
  25.  
  26.     return 0;
  27. }
  28.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
3 4 5
stdout 
三角形の3辺の長さ
a = 3.0
b = 4.0
c = 5.0
面積 s = 6.0
https://ideone.com/VVJZTv
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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