对三个变量按由小到大的顺序排序

 1 #include <iostream>
 2 
 3 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
 4 using namespace std;
 5 int main(int argc, char** argv) {
 6     void sort(int &,int &,int &);
 7     int a,b,c;
 8     int a1,b1,c1;
 9     cout <<"please enter 3 inteers:";
10     cin >>a>>b>>c;
11     a1=a;
12     b1=b;
13     c1=c;
14     sort(a1,b1,c1);
15     cout <<"sorted order is "<<a1<<" "<<b1<<" "<<c1<<endl;
16     return 0;
17 }
18 
19 void sort(int &i,int &j,int &k){
20     void change(int &,int &);
21     if(i>j) change(i,j);
22     if(i>k) change(i,k);
23     if(j>k) change(j,k);
24 }
25 
26 void change(int &x,int &y)
27 {
28     int temp;
29     temp=x;
30     x=y;
31     y=temp;
32 }