часовой пояс

#include <iostream>
using namespace std;
int main()
{
    double x;//time of mestnosti
    double m;//4asovoi poyas po mestnosti
    double k;//time of flying
    double n;//4asovoi poyas mesta prileta
 
    cin >> x >> m >> k >> n;
 
    double yaya = (k + (n - m)) + x;
 
    if (yaya > 23)
    {
        cout << yaya - 24 << endl;
    }
    else
    {
        cout << yaya << endl;
    }
    
    
}

int

#include <iostream>
using namespace std;
int main()
{
    unsigned short int x;//time of mestnosti
    unsigned short int m;//4asovoi poyas po mestnosti
    unsigned short int k;//time of flying
    unsigned short int n;//4asovoi poyas mesta prileta
 
    cin >> x >> m >> k >> n;
 
    unsigned short int yaya = (k + (n - m)) + x;
 
    if (yaya > 23)
    {
        while (yaya > 23)
        {
            yaya = yaya - 24;
        }
        cout << yaya << endl;
    }
    else
    {
        cout << yaya << endl;
    }
    
    
}

while(yaya > 23)
    yaya -= 24;