C++分解质因式

//输入n,输出n的质因数表达式

#include<bits/stdc++.h>

using namespace std;

int main()

{

    int a,b=0;

    cin>>a;

    cout<<a<<"=";

    if(a==1)

    {

        cout<<1<<endl;

        return 1;

    }

    for(int i=2;i<=a;i++)

    {

        if(a%i==0)

        {

            if(b>0) cout<<"*";

            cout<<i;

            b++;

            int ss=0;

            while(a%i==0)

            {

                a/=i;

                ss++;

            }

            if(ss>=2) cout<<"^"<<ss;

        }

    }

    return 0;

}

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转载自blog.csdn.net/csdn_3011692917/article/details/79768836