c语言简单运用，简单运用

in:2
5 red blue red yellow yellow
3 red yellow blue
out:
3
blue red yellow
3
blue red yellow

#include <stdio.h>
#include <string.h>

int main()
{
    int T;
    char color[100][11] = {0};
    char buf[11];
    scanf("%d", &T);
    while (T--)
    {
        int n;
        scanf("%d", &n);
        int cnt = 0, nohas;
        for (int i = 0; i < n; i++)
        {
            nohas = 1;
            scanf("%s", buf);
            for (int j = 0; j < i; j++)
            {
                if (strcmp(buf, color[j]) == 0)
                {
                    nohas = 0;
                    break;
                }
            }
            if (nohas)
            {
                strcpy(color[cnt], buf);
                cnt++;
            }
        }
        printf("%d\n", cnt);
        for (int i = 0; i < cnt - 1; i++)
        {
            for (int j = i+1; j < cnt; j++)
            {
                if(strcmp(color[i],color[j])>0)
                {
                    strcpy(buf, color[i]);
                    strcpy(color[i], color[j]);
                    strcpy(color[j], buf);
                }
            }
        }

        for (int i = 0; i < cnt; i++)
        {
            printf("%s ", color[i]);
        }
        printf("\n");
    }
    return 0;
}