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  1. #include <stdio.h>
  2. #include <math.h>
  3. struct DATA{
  4. 	double a;
  5. 	double b;
  6. 	double c;
  7. 	double result;
  8. };
  9. int main(void) {
  10. 	struct DATA data = {5, 5, 5};
  11. 	double s = (data.a+data.b+data.c)/2;
  12. 	data.result = sqrt(s*(s-data.a)*(s-data.b)*(s-data.c));
  13. 	printf("a=%f\nb=%f\nc=%f\n面積=%f\n",data.a,data.b,data.c,data.result);
  14. 	return 0;
  15. }
  16.  
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=5.000000
b=5.000000
c=5.000000
面積=10.825318
https://ideone.com/QyaGE4
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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