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  1. #include <stdio.h>
  2. #define daikei(a,b,d) (((a)+(b))*(d)*0.5);
  3.  
  4. int main(void) {
  5. 	// your code goes here
  6. 	double a,b,d;
  7. 	double c;
  8. 	scanf("%lf",&a);
  9. 	scanf("%lf",&b);
  10. 	scanf("%lf",&d);
  11.  
  12. 	c=daikei(a,b,d);
  13.  
  14. 	printf("%lf",c);
  15.  
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0.01s 5328KB
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stdin
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5.0
5.0
5.0
stdout
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25.000000
https://ideone.com/P9iYEo
language:
C (gcc 8.3)
created:
9 hours ago
visibility:
public

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