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/* cf - print character frequencies */
float f[128];

main(argc, argv)
int argc;
char *argv[];
{
        int i, c, nc;
        float cutoff, atof();

        if (argc <= 1)
                cutoff = 0.0;
        else
                cutoff = atof(argv[1])/100;
        for (i = 0; i <= 127; )
                f[i++] = 0.0;
        nc = 0;
        while ((c = getchar()) != -1) {
                f[c] += 1;
                nc++;
        }
        printf("char\tfreq\n");
        for (i = 0; i <= 127; ++i)
                if (f[i] && f[i]/nc >= cutoff) {
                        if (i <= ' ')
                                printf("%03o", i);
                        else
                                printf("%c", i);
                        printf("\t%.1f\n", 100*f[i]/nc);
                }
        return 0;
}