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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. float triangleArea(float a, float b, float c) {
  5.     float s = (a + b + c) / 2;
  6.     return sqrt(s * (s - a) * (s - b) * (s - c));
  7. }
  8.  
  9. int main() {
  10.     float a, b, c;
  11.  
  12.     printf("Enter 3 sides: ");
  13.     scanf("%f %f %f", &a, &b, &c);
  14.  
  15.     printf("Area = %.2f\n", triangleArea(a, b, c));
  16.  
  17.     return 0;
  18. }
  19.  
Success #stdin #stdout 0s 5280KB
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stdin
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3 4 5
stdout
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Enter 3 sides: Area = 6.00
https://ideone.com/nXoa1j
language:
C (gcc 8.3)
created:
11 hours ago
visibility:
public

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