varianta 3 subiectul III exercitul 2 neterminat

#include <iostream>
#include <cmath>
using namespace std;


int s1(int n)
{
    int c=0;
    while (n)
    {
        n=n/10;
        c++;
    }
    return c;
}



int s2(int k)
{
    int q,i,nr2,nou,cif,zece;
    cout<<"q= ";cin>>q;
    int cop;
    cop=q;

while (cop)
        for (i=1;i<=s1(q);i++)
    {
        zece=pow(10,i);
        if (cop%10==k)
        {
        nr2=cop%zece;
        cop=cop/zece;
        cop=cop*10+cop%10;
        cop=cop*zece+nr2;
        nou=cop;
        }
        cop=cop/10;
    }
    cout<<nou;
}







int main()
{
 s2(2);
    return 0;
}