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https://github.com/mirror/tinycc.git
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76 lines
3.3 KiB
C
76 lines
3.3 KiB
C
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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int ibdg(long long n)
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{
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switch (n) {
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case 1LL ... 9LL: return 1;
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case 10LL ... 99LL: return 2;
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case 100LL ... 999LL: return 3;
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case 1000LL ... 9999LL: return 4;
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case 10000LL ... 99999LL: return 5;
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case 100000LL ... 999999LL: return 6;
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case 1000000LL ... 9999999LL: return 7;
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case 10000000LL ... 99999999LL: return 8;
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case 100000000LL ... 999999999LL: return 9;
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case 1000000000LL ... 9999999999LL: return 10;
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case 10000000000LL ... 99999999999LL: return 11;
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case 100000000000LL ... 999999999999LL: return 12;
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case 1000000000000LL ... 9999999999999LL: return 13;
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case 10000000000000LL ... 99999999999999LL: return 14;
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case 100000000000000LL ... 999999999999999LL: return 15;
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case 1000000000000000LL ... 9999999999999999LL: return 16;
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case 10000000000000000LL ... 99999999999999999LL: return 17;
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case 100000000000000000LL ... 999999999999999999LL: return 18;
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case 1000000000000000000LL ... 9223372036854775807LL: return 19;
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case -9223372036854775807LL-1LL ... -1LL: return 20;
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}
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return 0;
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}
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int ubdg(unsigned long long n)
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{
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switch (n) {
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case 1ULL ... 9ULL: return 1;
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case 10ULL ... 99ULL: return 2;
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case 100ULL ... 999ULL: return 3;
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case 1000ULL ... 9999ULL: return 4;
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case 10000ULL ... 99999ULL: return 5;
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case 100000ULL ... 999999ULL: return 6;
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case 1000000ULL ... 9999999ULL: return 7;
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case 10000000ULL ... 99999999ULL: return 8;
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case 100000000ULL ... 999999999ULL: return 9;
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case 1000000000ULL ... 9999999999ULL: return 10;
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case 10000000000ULL ... 99999999999ULL: return 11;
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case 100000000000ULL ... 999999999999ULL: return 12;
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case 1000000000000ULL ... 9999999999999ULL: return 13;
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case 10000000000000ULL ... 99999999999999ULL: return 14;
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case 100000000000000ULL ... 999999999999999ULL: return 15;
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case 1000000000000000ULL ... 9999999999999999ULL: return 16;
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case 10000000000000000ULL ... 99999999999999999ULL: return 17;
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case 100000000000000000ULL ... 999999999999999999ULL: return 18;
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case 1000000000000000000ULL ... 9999999999999999999ULL: return 19;
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case 10000000000000000000ULL ... 18446744073709551615ULL: return 20;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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unsigned int i;
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unsigned long long v = 1;
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v = 1;
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for (i = 1; i <= 20; i++) {
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printf("%lld : %d\n", (long long) v, ibdg((long long)v));
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v *= 10;
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}
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v = 1;
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for (i = 1; i <= 20; i++) {
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printf("%llu : %d\n", v, ubdg(v));
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v *= 10;
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}
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return 0;
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}
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