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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int p, i;
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long long sum = 9;
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printf("请输入一个素数:\n");
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scanf("%d", &p);
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for (i = 1;; i++)
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if (sum % p == 0)break;
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else sum = sum * 10 + 9;
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printf("素数%d能整除%d个9组成的数%ld\n", p, i, sum);
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return 0;
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} |
