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  1. #include <stdio.h>
  2. #include <math.h>
  3. int main(void) {
  4. 	// your code goes here
  5. 	float a,b,c,s,area;
  6. 	scanf("%f,%f,%f",&a,&b,&c);
  7. 	s=(a+b+c)/2;
  8. 	area=sqrt(s*(s-a)*(s-b)*(s-c));
  9. 	printf("面积是%f\n",area);
  10. 	return 0;
  11. }
  12.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
345
stdout 
面积是-nan
https://ideone.com/03Q8T1
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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