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41 lines
759 B
41 lines
759 B
#include <bits/stdc++.h>
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using namespace std;
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const int INF = 0x3f3f3f3f;
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//判断素数
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bool isPrime(int n) {
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if (n < 2) return false;
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for (int i = 2; i <= n / i; i++)
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if (n % i == 0) return false;
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return true;
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}
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//分解质因数
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const int N = 110;
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int a[N];
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void divide(int n) {
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int k = 0;
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for (int i = 2; i <= n; i++) {
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//为了多次获取同一个质因子
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while (isPrime(i) && n % i == 0) {
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a[k++] = i;
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n /= i;
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}
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}
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}
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int main() {
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int n = 1234;
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divide(n);
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printf("%d=", n);
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for (int i = 0; i < N; i++) {
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if (!a[i])break;
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if (i > 0) printf("*");
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printf("%d", a[i]);
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}
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return 0;
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} |