'commit'

TangDou/LianXiTi50/45.cpp

@@ -0,0 +1,16 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int p, i;
+    long long sum = 9;
+    printf("请输入一个素数:\n");
+    scanf("%d", &p);
+    for (i = 1;; i++)
+        if (sum % p == 0)break;
+        else sum = sum * 10 + 9;
+
+    printf("素数%d能整除%d个9组成的数%ld\n", p, i, sum);
+    return 0;
+}