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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 data={5,5,5};
  12.  
  13. 	printf("a:%lf\n",data.a);
  14. 	printf("b:%lf\n",data.b);
  15. 	printf("c:%lf\n",data.c);	
  16.  
  17. 	double s=(data.a+data.b+data.c)/2.0;
  18.  
  19.     printf("area:%lf\n",sqrt(s*(s-data.a)*(s-data.b)*(s-data.c)));	
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
Standard input is empty
stdout 
a:5.000000
b:5.000000
c:5.000000
area:10.825318
https://ideone.com/j1C5IQ
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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