Can anyone tell me what is wrong with this program?

Question

<<TO REVERSE A STRING>>

#include <iostream>
using namespace std;
void findreverse(char a[])
{
char b[100];
int count =0; int k =0;
for(int i =0; a[i]!='\0';i++)
{
count++; // length of a string
}
for(int i =count;i>=0;i--)
{
b[k]=a[i];k++; cout<<b[k];
}
}
int main()
{
char a[100];
cout<<"Enter the string"<<endl;cin.getline(a,100);
findreverse(a);
return 0;
}

Answer 1

#include <iostream>
using namespace std;

void findreverse(const char a[])
{
char b[100];
int count =0;

for(; a[count]!='\0';count++)
; // length of a string

for(int i = count - 1;i>=0;i--)
{
b[count - i - 1]=a[i];
}
b[count] = 0;
cout << b << endl;
}
int main()
{
char a[100];
cout<<"Enter the string"<<endl;
cin.getline(a,100);
findreverse(a);
return 0;
}
// correction with a little bit of optimization