C++: Error in login, identify a valid triangle with greater greater then 0, all three angles provided

Question

I have written this program, it passes all manual test conditions but says "wrong answer" when I submit online on an IDE. Constraints 0≤a,b,c≤180

    #include <iostream>
using namespace std;

int main() {
    // your code goes here
    double a,b,c;
    cin>>a>>b>>c;
    if(a+b+c==180)
    cout<<"YES";
    else
    cout<<"NO";
    
    return 0;
}

Answer 1

The above code doesn't give correct answer when either of a,bc is zero and the a+b+c=180. So,

int main()
{
// your code goes here
double a,b,c;
cin>>a>>b>>c;
//add the below statement
if((a!=0)&&(b!=0)&&(c!=0)){
if(a+b+c==180)
cout<<"YES";
else
cout<<"NO";
}
else{
 cout<<"NO";
}
return 0;
}