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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 triangle;
  12.  
  13.     scanf("%lf", &triangle.a);
  14.     scanf("%lf", &triangle.b);
  15.     scanf("%lf", &triangle.c);
  16.  
  17.     double s = (triangle.a + triangle.b + triangle.c) / 2.0;
  18.     double area = sqrt(s * (s - triangle.a) * (s - triangle.b) * (s - triangle.c));
  19.  
  20.     printf("三角形の辺:はa = %.1lf, b = %.1lf, c = %.1lf\n", triangle.a, triangle.b, triangle.c);
  21.     printf("三角形の面積は %.6lf\n", area);
  22.  
  23.     return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
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5 5 5
stdout
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三角形の辺:はa = 5.0, b = 5.0, c = 5.0
三角形の面積は 10.825318
https://ideone.com/OGVbs8
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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