()()()()x()=()()()()填1-9数字

 /**
     Function: ()()()()x()=()()()()
     Developer:
     Date:

 */

 #include "iostream"
 #include "cstdlib"
 #include "string"
 #include "cstdio"
 #include "ctime"
 #include "sstream"
 using namespace std;
 int main()
 {
     clock_t start = clock();
     int s=,k=;
     string a="",b;
     char r;
     for(int i=;i<;i++){
         for(int j=;j<=;j++){
             stringstream s1,s2,s3,s4;
             a="";
             s=i*j;
             if(s>)
                 break;
             else{
                 s1<<i;s1>>b;
                 a+=b;
                 s2<<j;s2>>b;
                 a+=b;
                 s3<<s;s3>>b;
                 a+=b;//转化为字符串
                 k=;
                 if(a.find('')==-){//不含0
                     while(++k){//判断是否满足1-9条件
                         if(k==)
                         break;
                         r=k+;
                         if(a.find(r)==-){//不含r
                             break;
                         }
                     }
                 }
                 if(k>=)
                     cout<<i<<" * "<<j<<" = "<<s<<endl;
             }
         }
     }
     clock_t end1 = clock();
     double duration=end1-start;
     cout<<"算法耗时"<<duration<<"ms"<<endl;
     system("pause");
 }