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  • 质因数递归分解

    #include "stdio.h"
    #include <stdlib.h>
    #include <iostream>
    #include <math.h>
    using namespace std;
    
    int Prime(int number){
        for(int i = 2; i <= sqrt(number); i++ )
            if(number%i == 0 )
                return 0;
        return 1;
    }
    
    void PrimeFactor(int number){
        for(int i = 2; i <= number; i++)
            if(number%i == 0 && Prime(i))
            {
                cout << i;
                if(!Prime(number))
                    cout << '*';
                number = number/i;
                PrimeFactor(number);
                return ; //一定要加,否则第一次分解得到的数会因为for循环再次被分解
            }
    }
    int main(){
        int number;
        cout << "please key in the number:" << endl;
        cin >> number;
        cout << "the result is :number = ";
        PrimeFactor(number);
        cout << endl;
        return 1;
    
    }
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  • 原文地址:https://www.cnblogs.com/digulove/p/8012711.html
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