Can anyone help me break it down on what this code is trying to do? Its an array problem c++

Question

int removeDups (string a[], int n){
if (n < 0)
return -1;
int duplicate = 0;
string duplicateString = a[0];
for (int i = 1; i < n; i++){
if(a[i] == duplicateString)
a[i] = "duplicate";
else
duplicateString = a[i];
}
for (int i = 0; i < n; i++){
while (a[i]!= "duplicate" && i<n-1){
i++;
}
for (int k = i+1; k < n; k++){
while (a[k] == "duplicate" && k < n-1){
k++;
}
string temp = a[k];
a[k]+a[i];
a[i] = temp;
break;
}
}
for (int i = 0; i < n; i++){
if (a[i]!= "duplicate")
duplicate++;
}
return duplicate;
}

Answer 1

boba it is trying to find duplicates in strings in an array
It also appears to be incomplete

Answer 2

Really BroFar ? Where does it appears incomplete at?