Посчитать, сколько дискет понадобится для переноса фильма

#include <iostream>
#include <cmath>
 
using namespace std;
 
int main(int argc, char *argv[])
{
    const int KB_in_GB=1048576, size_floppy=1440;
    float size;
    cout<<"Enter size: ";
    cin>>size;
    cout<<ceil(size*KB_in_GB/size_floppy)<<" floppy disks"<<endl;
    return 0;
}

#include<iostream>
int main(){
    double floppy=1.44/1024;
    double film;
    int nfloppy;
    std::cout<<"Enter size of film: ";
    std::cin>>film;
    nfloppy=film/floppy;
    if(nfloppy<film/floppy)
        ++nfloppy;
    std::cout<<nfloppy;
return 0;
}

#include <iostream>
#include <cmath>
 
using namespace std;
 
int main(int argc, char *argv[])
{
    const float bits_in_GB=8590e+6;
    float size,speed;
    int seconds;
    cout<<"Enter size: ";
    cin>>size;
    cout<<"Enter speed: ";
    cin>>speed;
    seconds=size/speed*bits_in_GB;
    cout<<seconds/60/60<<" hours, "<<seconds/60%60<<" minuts, "<<
        seconds%60<<" seconds"<<endl;
    return 0;
}

#include <iostream>
 
using namespace std;
 
int main(int argc, char *argv[])
{
    int n,des,sot;
    cout<<"Enter number: ";
    cin>>n;
    des=n%100/10;
    sot=n%1000/100;
    cout<<"Result:"<<endl<<des<<" tens, "<<sot<<" hundreds"<<endl;
    return 0;
}

des=n/10;
 sot=n/100;