Ｃ＋＋　寫一程式，輸入字串後，POINT反轉的字串?

#include <iostream>
using namespace std;

int main() {
char mycin[300];
string cmplist[5]={"a","e","i","o","u"};
string sin,sout="";
int index=0;
int count=0;
cout<<"請輸入字串：";
cin.getline(mycin,300);
sin+=mycin;
for(int i;i<5;i++)
{
index=0;
count=0;
while((index=sin.find(cmplist[i],index))>-1)
{
count++;
index++;
}
cout<<cmplist[i]<<"："<<count<<"個"<<endl;
}
count=0;
for(int i=sin.length()-1;i>=0;i--)
{
char c=sin[i];
sout+=c;
if((c< a ||c> z )&&(c< A ||c> Z )) count++;
}
cout<<"其他字母(含空白)："<<count<<"個 "<<endl;
cout<<"反轉字串為："<<sout<<endl;

return 0;
}

。。。