请问这题该怎么做？不能用数组和函数。

Question

Answer 1

#include <iostream>
using namespace  std;

int main()
{
    int c= 0;
    for (int i1 = 1; i1<= 9 ;i1++) {
        for (int j1 = 1; j1<=9 ;j1++) {
            for (int k1 = 1; k1<=9 ;k1++) {
                if(i1 == j1 || i1 == k1 || k1 == j1) continue;
                for (int i2 = 1; i2<=9 ;i2++) {
                    for (int j2 = 1; j2<=9 ;j2++) {
                        for (int k2 = 1; k2<=9 ;k2++) {
                            if(i2 == j2 || i2 == k2 || k2 == j2) continue;
                            if(i1 == i2 || i1 == j2 || i1 == k2)  continue;
                            if(j1 == i2 || j1 == j2 || j1 == k2)  continue;
                            if(k1 == i2 || k1 == j2 || k1 == k2)  continue;
                            for (int i3 = 1; i3<=9 ;i3++) {
                                for (int j3 = 1; j3<=9 ;j3++) {
                                    for (int k3 = 1; k3<=9 ;k3++) {
                                        if(i3 == j3 || i3 == k3 || k3 == j3) continue;
                                        if(i1 == i3 || i1 == j3 || i1 == k3)  continue;
                                        if(j1 == i3 || j1 == j3 || j1 == k3)  continue;
                                        if(k1 == i3 || k1 == j3 || k1 == k3)  continue;
                                        if(i2 == i3 || i2 == j3 || i2 == k3)  continue;
                                        if(j2 == i3 || j2 == j3 || j2 == k3)  continue;
                                        if(k2 == i3 || k2 == j3 || k2 == k3)  continue;
                                         int num1 = i1*100 + j1*10 +k1;
                                         int num2 = i2*100 + j2*10 +k2;
                                         int num3 = i3*100 + j3*10 +k3;

                                         if(num1 >= num2) continue;
                                         if(num2 >= num3) continue;

                                         if(num1 + num2 + num3 == 1953){
                                             cout <<"NO. \t"<<num1<<"+"<<num2<<"+"<<num3<<endl;
                                             c++;
                                         }
                                    }
                                }
                            }


                        }
                    }
                }
            }
        }
    }
    cout <<"total="<<c;
    return 0;
}

运行结果如下：