借书方案知多少

小明有5本新书，要借给A，B，C这三位小朋友，若每次每人只能借一本，则可以有多少种不同的借法？

直接输代码

#include<iostream>
using namespace std;
int main()
{
    int a = 0, b = 0, c = 0;
    for (int a = 1; a <=5 ; a++)
    {
        for (int b = 1; b <= 5; b++)
        {
            for (int c = 1; c <= 5; c++)
            {
                if (a != b && a != c && b != c)
                    cout << a << "  " << b << "   " << c << "   " << endl;
            }
        }
    }
    return 0;
}