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  1. #include <stdio.h>
  2. #include <math.h>
  3. struct triangle{
  4.  double a;
  5.  double b;
  6.  double c;
  7. };
  8.  
  9. int main(void) {
  10.  struct triangle tri;
  11.     scanf("%lf",&tri.a);
  12.     scanf("%lf",&tri.b);
  13.     scanf("%lf",&tri.c);
  14.  double p;
  15.  p=(tri.a+tri.b+tri.c)/2;
  16.  double t;
  17.  t=p*(p-tri.a)*(p-tri.b)*(p-tri.c);
  18.  double s;
  19.  s=sqrt(t);
  20.  printf("a=%lf,b=%lf,c=%lf\n",tri.a,tri.b,tri.c);
  21.  printf("s=%lf",s);
  22.  
  23.  return 0;
  24. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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5 5 5
stdout
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a=5.000000,b=5.000000,c=5.000000
s=10.825318
https://ideone.com/nwrgmk
3課題5.1
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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