Pretvornik casa hms - s in razlika casov

#include <iostream>

using namespace std;

int hms_v_sec (int h,int m,int s)
{
    return h*3600+m*60+s;
}
int hms_v_sec1 (int h1, int m1,int s1)
{
    return h1*3600+m1*60+s1;
}
void sec_v_hms (int time, int &h, int &m, int &s)
{
   h=time/3600;
   time=time%3600;
   m=time/60;
   time=time%60;
   s=time;

}
int main()
{
   int h1,m1,s1,h,m,s,time,hour,min,sec,skupno,h3,m3,s3;
    cout << "Pretvornik casa hms - s" << endl;
    cout<< "Vpisi prvi cas: (h/m/s):";
    cin>>h>>m>>s;
    cout<<"Vpisi drugi cas: (h/m/s)";
    cin>>h1>>m1>>s1;

    cout<<endl;
    cout<<"cas v sekundah= "<<hms_v_sec (h,m,s)<<endl;
    cout<<"cas v sekundah= "<<hms_v_sec1 (h1,m1,s1)<<endl;

    if (hms_v_sec > hms_v_sec1)
    {
        skupno=hms_v_sec(h,m,s) - hms_v_sec1(h1,m1,s1);
        cout<<"razlika casov je: "<<skupno<<endl;
    }
    else
        skupno=hms_v_sec1(h1,m1,s1) - hms_v_sec(h,m,s);
        cout<<"Razlika casov je: "<<skupno<<endl;

        sec_v_hms (skupno,h3,m3,s3);
        cout<<endl<<"ure: "<<h3<<", minute: "<<m3<<", sekunde: "<<s3<<endl;




    return 0;
}