C++ program to check whether a triangle is valid or not
A triangle is valid if the sum of all the three angles is equal to 180 degrees.
using namespace std;
int main() {
int a , b , c; //to accept 3 angles from the user;
cout<<"Enter first angle \n";
cin>>a;
cout<<"Enter second angle \n";
cin>>b;
cout<<"Enter third angle \n";
cin>>c;
if( a + b + c == 180 && a!=0 && b!=0 && c!=0)
{
cout<<"It is a valid triangle. \n";
}
else
{
cout<<"It is not a valid triangle\n";
}
return 0;
}
Output:
Enter first angle
20
Enter second angle
40
Enter third angle
120
It is a valid triangle.
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