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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;

}