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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main(void)
  5. {
  6.     float a, b, c, s, area;
  7.     printf("Input a,b,c:");
  8.     scanf("%f,%f,%f", &a, &b, &c);
  9.     s = (a + b + c) / 2;
  10.     area = (float)sqrt(s * (s - a) * (s - b) * (s - c));
  11.     printf("area = %f\n", area);
  12.     return 0;
  13. }
Success #stdin #stdout 0.01s 5292KB
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stdin
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Standard input is empty
stdout
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Input a,b,c:area = -nan
https://ideone.com/qCD1gN
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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