未初始化的int C ++

Question

警告“keit”可能在此功能中未初始化。我的代码停止工作也许有人可以帮忙吗？

#include <iostream>
#include <fstream>
//--------------------------------------------------------------------------
using namespace std;
//--------------------------------------------------------------------------
const char CDfv[] = "Duomenys.txt";
const char CRfv[] = "Rezultatai.txt";
//--------------------------------------------------------------------------
void Skaitymas (int &ilg);
void Atgrezimas (int);
void Rasymas (int);
//--------------------------------------------------------------------------
const int cMax = 100;
int C[cMax];
//--------------------------------------------------------------------------
int main()
{
    int ilg;
    Skaitymas (ilg);
    Atgrezimas (ilg);
    Rasymas (ilg);
    return 0;
}
//--------------------------------------------------------------------------
void Skaitymas (int &ilg){
    ifstream fd(CDfv);
    fd >> ilg;
    for (int i = 0; i < ilg; i++)
    fd >> C[i];
    fd.close();
}
//--------------------------------------------------------------------------
void Atgrezimas(int ilg){
    int keit;
    for (int i = 0; i < ilg; i--){
        ilg--;
        C[i] = keit;
        C[i] = C[ilg];
        C[ilg] = keit;
    }
}
//--------------------------------------------------------------------------
void Rasymas(int ilg){
    ofstream fr(CRfv);
    for(int i = 0; i < ilg; i++)
        fr << C[i];
    fr.close();
}
//--------------------------------------------------------------------------