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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct Triangle {
  5.     double a;
  6.     double b;
  7.     double c;
  8. };
  9.  
  10. int main(void) {
  11.     struct Triangle t;
  12.     double p, s;
  13.  
  14.     scanf("%lf %lf %lf", &t.a, &t.b, &t.c);
  15.  
  16.     p = (t.a + t.b + t.c) / 2.0;
  17. 	s = sqrt(p * (p - t.a) * (p - t.b) * (p - t.c));
  18.  
  19.     printf("a:%g\n", t.a);
  20.     printf("b:%g\n", t.b);
  21.     printf("c:%g\n", t.c);
  22.     printf("三角形の面積：%f\n", s);
  23.  
  24.     return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5324KB
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/6gcFnL
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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