GİRİLEN BİR CÜMLEDEKİ SESLİ HARFLERİN SAYISINI BULAN PROGRAM (STRİNG)

#include <iostream>
#include <string>
using namespace std;
int main()
{size_t saya=0,sayac=0,say=0,sa=0,s=0;
    string c;
    getline(cin,c);
    for(int i=0;i<c.length();i++)
        {if(c[i]=='a')
        sayac++;
        else if(c[i]=='e')
            saya++;
    else if(c[i]=='i')
        say++;
    else if(c[i]=='o')
        sa++;
    else if(c[i]=='u')
        s++;


}
cout<<"a="<<sayac<<endl;
cout<<"e="<<saya<<endl;
cout<<"i="<<say<<endl;
cout<<"o="<<sa<<endl;
cout<<"u="<<s<<endl;
}