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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     double a, b, c;
  6.  
  7.     cout << "enter side a: ";
  8.     cin >> a;
  9.  
  10.     cout << "enter side b: ";
  11.     cin >> b;
  12.  
  13.     cout << "enter side c: ";
  14.     cin >> c;
  15.  
  16.     if (a > 0 && b > 0 && c > 0) {
  17.     	if (a*a == b*b + c*c ||
  18.     	    b*b == a*a + c*c ||
  19.     	    c*c == a*a + b*b) {
  20.  
  21.  
  22.     	    cout << "this is a right triangle.\n";
  23.     	    }
  24.     	    else {
  25.     	    	cout << "this is NOT a right triangle.\n";
  26.     	    }
  27.     	}
  28.     	else {
  29.     		cout << "all sides must be positive!\n";
  30.     	}
  31.  
  32. 	return 0;
  33. }
Success #stdin #stdout 0.01s 5320KB
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Standard input is empty
stdout
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enter side a: enter side b: enter side c: this is a right triangle.
https://ideone.com/DcBedp
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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