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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 A={7,8,9};
  12. 	double s=(A.a+A.b+A.c)/2;
  13. 	double S=sqrt(s*(s-A.a)*(s-A.b)*(s-A.c));
  14.     printf("a = %.1lf\n", A.a);
  15.     printf("b = %.1lf\n", A.b);
  16.     printf("c = %.1lf\n", A.c);
  17.     printf("三角形の面積: S = %.2lf\n", S);
  18.  
  19.  return 0;
  20. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
5
5
5
stdout 
a = 7.0
b = 8.0
c = 9.0
三角形の面積: S = 26.83
https://ideone.com/JSyvex
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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