C++_按大小輸出三個數

僞碼： 

ORDER(n1,n2,n3,pointer1,pointer2,pointer3)  //輸入3個數a,b,c按大小順序輸出//

1. input(n1,n2,n3)                                //輸入元素//
2. data(pointer1)<-n1;(pointer2)<-n2;(pointer3)<-n3                  //pointer1,pointer2,pointer分別指向n1,n2,n3//
3. if(n1>n2)
4. then SWAP (pointer1,pointer2)
5. if(n1>n3)
6. then SWAP(pointer1,pointer3)
7. if(n2>n3)
8. then SWAP(pointer2,pointer3)                    //排序//
9. output(n1,n2,n3)                                //輸出//
10. return

SWAP(p1, p2)                           //交換數據//

1. p=p1;p1=p2;p2=p
2. return

測試用例：n1,n2,n3:4,3,5

測試結果：the sorted numbers are:3        4       5

源程序：

#include"iostream"

using namespace std;

int main()

{

      int n1,n2,n3,t;

      cout<<"please input 3 number:n1,n2,n3:";

      cin>>n1>>n2>>n3;

      if(n1>n2)

      {

            t=n1;

            n1=n2;

            n2=t;

      }

      if(n1>n3)

      {

            t=n1;

            n1=n3;

            n3=n1;

      }

      if(n2>n3)

      {

            t=n2;

            n2=n3;

            n3=t;

      }

      cout<<"the sorted numbers are:"<<n1<<'\t'<<n2<<'\t'<<n3;

      system("pause");

      return 0;

}