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54 lines
1.2 KiB
Brainfuck
54 lines
1.2 KiB
Brainfuck
/*
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This is a program to determine the distribution of digits in the
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fraction part of PI. It will look at the first scale digits.
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The results are left in the global variable digits.
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digits[0] is the number of 0's in PI.
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This program requires the math library.
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*/
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define pi () {
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auto ix, pi, save_scale, work;
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save_scale = scale;
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scale += 5;
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print "\n\nCalculating PI to ",scale," digits. Please wait . . .";
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pi = 4*a(1);
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scale -= 5;
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work = pi;
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print "\nCounting digits. . .";
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for (ix = 0; ix < 10; ix++) digits[ix] = 0;
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/* Extract the One's digit from pi. */
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scale = 0;
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one_digit = work / 1;
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for (ix = save_scale; ix > 0; ix--) {
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/* Remove the One's digit and multiply by 10. */
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scale = ix;
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work = (work - one_digit) / 1 * 10;
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/* Extract the One's digit. */
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scale = 0;
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one_digit = work / 1;
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digits[one_digit] += 1;
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}
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/* Restore the scale. */
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scale = save_scale;
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/* Report. */
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print "\n\n"
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print "PI to ", scale, " digits is:\n", pi/1, "\n\n"
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print "The frequency of the digits are:\n"
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for (ix = 0; ix < 10; ix++) {
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print " ", ix, " - ", digits[ix], " times\n"
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}
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print "\n\n"
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}
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