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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.  
  13.     double p;
  14.     double s;
  15.  
  16.     scanf("%lf\n", &t.a);
  17.     scanf("%lf\n", &t.b);
  18.     scanf("%lf\n", &t.c);
  19.  
  20.     p = (t.a + t.b + t.c) / 2.0;
  21.  
  22.     s = sqrt(p * (p - t.a) * (p - t.b) * (p - t.c));
  23.  
  24.     printf("a : %0.lf\n", t.a);
  25.     printf("b : %0.lf\n", t.b);
  26.     printf("c : %0.lf\n", t.c);
  27.     printf("三角形の面積 : %f\n", s);
  28.  
  29.     return 0;
  30. }
  31.  
  32.  
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
5
5
5
stdout 
a : 5
b : 5
c : 5
三角形の面積 : 10.825318
https://ideone.com/ufRZRU
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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