46 lines
1 KiB
C
46 lines
1 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include "palindrome_generator.h"
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#define LIMIT 128
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// expects a const char* for "msg"
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#define LOG(msg) do { \
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printf("%s:%u %s\n", __FILE__, __LINE__, msg); \
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} while (0);
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int main(int argc, char **argv) {
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unsigned long long limit = LIMIT;
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if (argc == 1) {
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// do nothing
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} else if (argc == 2) {
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limit = strtoull(argv[1], NULL, 10);
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if (limit == 0) {
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LOG("ERROR: Failed to parse arg into unsigned long long");
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return 1;
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}
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} else {
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LOG("ERROR: Program requires one integer as its only argument, or no "
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"args");
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return 2;
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}
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printf("Generating sum of reciprocals of palindromes with \"limit\" of "
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"%llu\n",
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limit);
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double sum = 0.0;
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PGeneratorState state = PGenerator_Init();
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while(limit > 0) {
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--limit;
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sum += 1.0 / (double)(PGenerator_Next(&state));
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}
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printf("Resulting sum == %.16lf, last state is %llu\n", sum, state.current);
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return 0;
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}
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