()()()()x()=()()()()填1-9数字

 1 /**
 2     Function: ()()()()x()=()()()()
 3     Developer:
 4     Date:
 5 
 6 */
 7 
 8 #include "iostream"
 9 #include "cstdlib"
10 #include "string"
11 #include "cstdio"
12 #include "ctime"
13 #include "sstream"
14 using namespace std;
15 int main()
16 {
17     clock_t start = clock();
18     int s=0,k=0;
19     string a="",b;
20     char r;
21     for(int i=1200;i<5000;i++){
22         for(int j=2;j<=4;j++){
23             stringstream s1,s2,s3,s4;
24             a="";
25             s=i*j;
26             if(s>10000)
27                 break;
28             else{
29                 s1<<i;s1>>b;
30                 a+=b;
31                 s2<<j;s2>>b;
32                 a+=b;
33                 s3<<s;s3>>b;
34                 a+=b;//转化为字符串
35                 k=0;
36                 if(a.find('0')==-1){//不含0
37                     while(++k){//判断是否满足1-9条件
38                         if(k==10)
39                         break;
40                         r=k+48;
41                         if(a.find(r)==-1){//不含r
42                             break;
43                         }
44                     }
45                 }
46                 if(k>=10)
47                     cout<<i<<" * "<<j<<" = "<<s<<endl;
48             }
49         }
50     }
51     clock_t end1 = clock();
52     double duration=end1-start;
53     cout<<"算法耗时"<<duration<<"ms"<<endl;
54     system("pause");
55 }