Finding unique elements in an string array in C

Question

C bothers me with its handling of strings. I have a pseudocode like this in my mind:

char *data[20]; 

char *tmp; int i,j;

for(i=0;i<20;i++) {
  tmp = da         


        

Answer 1

char *data[20];
int i, j, n, unique[20];

n = 0;
for (i = 0; i < 20; ++i)
{
    for (j = 0; j < n; ++j)
    {
        if (!strcmp(data[i], data[unique[j]]))
           break;
    }

    if (j == n)
        unique[n++] = i;
}

The indexes of the first occurrence of each unique string should be in unique[0..n-1] if I did that right.