需要一些有关此 while 循环的建议

Question

I'm having difficulties understanding the problem here. From my perspective it looks like the loop should continue executing when any of these conditions are true. When all of the "if" conditions are true, that should kick in and terminate the program. What am I doing wrong?

double height ;
double width ;
double load ;
double buckle_threshold ;
double area ;
double compress_threshold ;
double slenderness_value ;
const int slenderness_limit = 50 ;
const int E = 1700000 ;
const int stress = 1450 ;
const int inches = 12 ;

cout << "Enter column height in feet: " ;
cin >> height ;
cout << "Enter expected load in pounds: " ;
cin >> load ;

while ( load > buckle_threshold || load > compress_threshold || slenderness_value > slenderness_limit );
{
    cout << "Enter column width in inches: " ;
    cin >> width ;

    slenderness_value = (height/width)*(inches) ;
    area = width*width ;
    buckle_threshold = (.3*E*area)/(pow((height/width),2)) ;
    compress_threshold = area*stress ;


    if (load <= buckle_threshold && load <= compress_threshold && slenderness_value <= slenderness_limit );
    {
        cout << "Compress Threshold = " << compress_threshold << endl ;
        cout << "Buckle Threshold = " << buckle_threshold << endl ;
        cout << "Column is safe." ;

        return 0;
    }

    cout << "Compress Threshold = " << compress_threshold << endl ;
    cout << "Buckle Threshold = " <<buckle_threshold << endl ;
    cout << "Column is unsafe." << endl ;

}

return 0;

Answer 1

You have a semicolon on the while/if loop. Remove it:

while ( load > buckle_threshold || load > compress_threshold 
 || slenderness_value > slenderness_limit );  <--- Right there!


if (load <= buckle_threshold && load <= compress_threshold 
&& slenderness_value <= slenderness_limit );  <--- Here too!