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Type of Triangle

/ Published in: C
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Given a, b, c find which kind of triangle can be build with those values.

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  1. #include<stdio.h>
  2. #define NONE -1
  3. #define EQUILATERAL 0
  4. #define ISOSCELES 1
  5. #define SCALENE 3
  6.  
  7. int isTriangle(int a, int b, int c)
  8. {
  9. 	if(a < 1 || b < 1 || c < 1)
  10. 		return NONE;
  11. 	if(a+b <= c || a+c <= b || c+b <= a)
  12. 		return NONE;
  13. 	if(a == b && a == c)
  14. 		return EQUILATERAL;
  15. 	if(a == b || b == c || a == c)
  16. 		return ISOSCELES;
  17. 	else
  18. 		return SCALENE;
  19. }
  20.  
  21. int main()
  22. {
  23. 	printf("%d\n", isTriangle(11,10,17));
  24. 	printf("%d\n", isTriangle(11,10,11));
  25. 	printf("%d\n", isTriangle(11,11,11));
  26. 	printf("%d\n", isTriangle(11,110,11));
  27. 	printf("%d\n", isTriangle(11,0,11));
  28. 	return 0;
  29. }

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