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  1. #include <stdio.h>
  2. #include <math.h>
  3.   struct triangle{
  4.     double a,b,c;
  5.   };
  6. int main(void){
  7.   struct triangle t={5,5,5};
  8.   double h,S;
  9.   h = (t.a + t.b + t.c) / 2.0;
  10.   S = sqrt(h * (h - t.a) * (h - t.b) * (h - t.c));
  11.  
  12.   printf("a: %g\n", t.a);
  13.   printf("b: %g\n", t.b);
  14.   printf("c: %g\n", t.c);
  15.   printf("三角形の面積: %f\n", S);
  16.  
  17.   return 0;
  18. }
  19.  
Success #stdin #stdout 0.01s 5320KB
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stdin
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Standard input is empty
stdout
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a: 5
b: 5
c: 5
三角形の面積: 10.825318
https://ideone.com/g2ZNOX
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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