指標 (三)

tonyh

利用指標法 (變更門牌), 將變數x與變數y的值對調.

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.      int x=10, y=5;
   
7.      int *xPtr=&x, *yPtr=&y;  //宣告指標xPtr與yPtr,同時將x與y的位址指派給它們
   
8.      cout<<"[對調前]"<<endl;
   
9.      cout<<"x="<<*xPtr<<endl;
   
10.      cout<<"y="<<*yPtr<<endl;
    
11.      cout<<"變數x的位址: "<<xPtr<<endl;
    
12.      cout<<"變數y的位址: "<<yPtr<<endl<<endl;
    
13.      xPtr=&y;
    
14.      yPtr=&x;
    
15.      cout<<"[對調後]"<<endl;
    
16.      cout<<"x="<<*xPtr<<endl;
    
17.      cout<<"y="<<*yPtr<<endl;
    
18.      cout<<"變數x的位址: "<<xPtr<<endl;
    
19.      cout<<"變數y的位址: "<<yPtr<<endl<<endl;
    
20.      system("pause");
    
21.      return 0;
    
22. }

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陳人瑀

1. #include <bits/stdc++.h>
   
2. 
   
3. using namespace std;
   
4. 
   
5. int main()
   
6. {
   
7.     int x=10,y=5;
   
8.     int *xptr=&x ,*yptr=&y;
   
9.     cout<<x<<" "<<y<<endl;
   
10.     cout<<&x<<" "<<&y<<endl;
    
11.     xptr= &y;
    
12.     yptr= &x;
    
13.     cout<<*xptr<<" "<<*yptr<<endl;
    
14.     cout<<&x<<" "<<&y<<endl;
    
15. 
    
16.     return 0;
    
17. }

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陳品叡

1. #include <bits/stdc++.h>
   
2. 
   
3. using namespace std;
   
4. 
   
5. 
   
6. 
   
7. int main()
   
8. {
   
9.     int x = 10, y = 100, *xptr = &x, *yptr = &y;
   
10.     cout << "x=" << *xptr << endl;
    
11.     cout << "y=" << *yptr << endl;
    
12.     cout << "x位置: " << xptr << endl;
    
13.     cout << "y位置: " << yptr << endl;
    
14.     swap(xptr ,yptr);
    
15.     cout << "x=" << *xptr << endl;
    
16.     cout << "y=" << *yptr << endl;
    
17.     cout << "x位置: " << xptr << endl;
    
18.     cout << "y位置: " << yptr << endl;
    
19.     return 0;
    
20. }

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劉得恩

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.      int x=10,y=5;
   
7.      int* xPtr=&x, *yPtr=&y;  
   
8.       
   
9.      
   
10.            cout<<"[對調前]"<<endl;
    
11.         cout<<"x="<<*xPtr<<endl;
    
12.     cout<<"y="<<*yPtr<<endl;
    
13.     cout<<"變數x的位址: "<<xPtr<<endl;
    
14.     cout<<"變數y的位址: "<<yPtr<<endl<<endl;
    
15.     xPtr=&y;
    
16.     yPtr=&x;
    
17.     cout<<"[對調後]"<<endl;
    
18.     cout<<"x="<<*xPtr<<endl;
    
19.     cout<<"y="<<*yPtr<<endl;
    
20.     cout<<"變數x的位址: "<<xPtr<<endl;
    
21.     cout<<"變數y的位址: "<<yPtr<<endl<<endl;
    
22. 
    
23.      
    
24.      system("pause");
    
25.      return 0;
    
26. }

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劉得旗

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     int x=10, y=5;
   
7.     int *xPtr,*yPtr;
   
8.     xPrt=&x;
   
9.     yPrt=&y;
   
10.     cout<<"[對調前]"<<endl;
    
11.     cout<<"x="<<*xPtr<<endl;
    
12.     cout<<"y="<<*yPtr<<endl;
    
13.     cout<<"變數x的位址:"<<xPtr<<endl;
    
14.     cout<<"變數y的位址:"<<yPtr<<endl;
    
15.     xPtr=&y;
    
16.     yPtr=&x;
    
17.     cout<<"[對調後]"<<endl;
    
18.     cout<<"x="<<*xPtr<<endl;
    
19.     cout<<"y="<<*yPtr<<endl;
    
20.     cout<<"變數x的位址:"<<xPtr<<endl;
    
21.     cout<<"變數y的位址:"<<yPtr<<endl;
    
22.     system("pause");
    
23.     return 0;
    
24. }

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李允軒

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. 
   
5. int main()
   
6. {
   
7.     int x, y;
   
8.     x = 10;
   
9.     y = 5;
   
10.     int *xPtr, *yPtr;
    
11.     xPtr = &x;
    
12.     yPtr = &y;
    
13.     cout << "[對調前]" << endl;
    
14.     cout << " x = :" << *xPtr << endl;
    
15.     cout << " y = :" << *yPtr << endl;
    
16.     cout << "變數x的地址 :" << xPtr << endl;
    
17.     cout << "變數y的地址 :" << yPtr << endl;
    
18.     xPtr = &y;
    
19.     yPtr = &x;
    
20.     cout << "[對調後]" << endl;
    
21.     cout << " x = :" << *yPtr << endl;
    
22.     cout << " y = :" << *xPtr << endl;
    
23.     cout << "變數x的地址 :" << yPtr << endl;
    
24.     cout << "變數y的地址 :" << xPtr << endl;
    
25.     system("pause");
    
26.     return 0;
    
27. }

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張彥承

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. using namespace std;
   
5. int main()
   
6. {
   
7.     int x=10,y=5;
   
8.     int *xPtr, *yPtr;
   
9.     xPtr=&x;
   
10.     yPtr=&y;
    
11.     cout<<"[對調前]"<<endl;
    
12.     cout<<"x= "<<*xPtr<<endl;
    
13.     cout<<"y= "<<*yPtr<<endl;
    
14.     cout<<"變數x的位址: "<<xPtr<<endl;
    
15.     cout<<"變數y的位址: "<<yPtr<<endl;
    
16.     xPtr=&y;
    
17.     yPtr=&x;
    
18.     cout<<"[對調後]"<<endl;
    
19.      cout<<"[對調前]"<<endl;
    
20.     cout<<"x= "<<*xPtr<<endl;
    
21.     cout<<"y= "<<*yPtr<<endl;
    
22.     cout<<"變數x的位址: "<<xPtr<<endl;
    
23.     cout<<"變數y的位址: "<<yPtr<<endl;
    
24.     xPtr=&y;
    
25.     yPtr=&x;
    
26.     system("pause");     
    
27.     return 0;   
    
28. }

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周雍程

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     int x=10, y=5;
   
7.     int *xPtr, *yPtr;
   
8.     xPtr=&x;
   
9.     yPtr=&y;
   
10.     cout<<"[對調前]"<<endl;
    
11.     cout<<"x="<<*xPtr<<endl;
    
12.     cout<<"y="<<*yPtr<<endl;
    
13.     cout<<"變數x的位址: "<<xPtr<<endl;
    
14.     cout<<"變數y的位址: "<<yPtr<<endl;
    
15.     xPtr=&y;
    
16.     yPtr=&x;
    
17.     cout<<"[對調後]"<<endl;
    
18.     cout<<"x="<<*xPtr<<endl;
    
19.     cout<<"y="<<*yPtr<<endl;
    
20.     cout<<"變數x的位址: "<<xPtr<<endl;
    
21.     cout<<"變數y的位址: "<<yPtr<<endl;
    
22.     system("pause");  
    
23.     return 0;        
    
24. }

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張郁庭

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     int x=10,y=5;
   
7.     int *xPtr,*yPtr;
   
8.     xPtr=&x;
   
9.     yPtr=&y;
   
10.     cout<<"[對調前]"<<endl;
    
11.     cout<<"x="<<xPtr<<endl;
    
12.     cout<<"y="<<yPtr<<endl;
    
13.     cout<<"變數x的位置: "<<xPtr<<endl;
    
14.     cout<<"變數y的位置: "<<yPtr<<endl;
    
15.     xPtr=&y;
    
16.     yPtr=&x;
    
17.     cout<<"[對調後]"<<endl;
    
18.     cout<<"x="<<xPtr<<endl;
    
19.     cout<<"y="<<yPtr<<endl;
    
20.     cout<<"變數x的位置: "<<xPtr<<endl;
    
21.     cout<<"變數y的位置: "<<yPtr<<endl;
    
22.     system("pause");
    
23.     return 0;  
    
24. }  

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林宇翔

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.      int x = 10, y = 5;
   
7.      int *xPtr,*yPtr;
   
8.      xPtr=&x;
   
9.      yptr=&y;
   
10.      cout<<"對調前  "<<x<<endl;
    
11.      cout<<"x=:  "<<*xPtr<<endl;
    
12.      cout<<"y=:  "<<*yPtr<<endl;
    
13.      cout<<"變數x的地址"<<xPtr<<endl;
    
14.      cout<<"變數y的地址"<<yPtr<<endl;
    
15.      xPtr=&y;
    
16.      yptr=&x;
    
17.      cout<<"對調後  "<<x<<endl;
    
18.      cout<<"x=:  "<<*xPtr<<endl;
    
19.      cout<<"y=:  "<<*yPtr<<endl;
    
20.      cout<<"變數x的地址"<<xPtr<<endl;
    
21.      cout<<"變數y的地址"<<yPtr<<endl;
    
22.      system("pause");
    
23.      return 0;
    
24. }

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張峻瑋

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     int x=10,y=5;
   
7.     int *xPtr,*yPtr;
   
8.     xPtr=&x;
   
9.     yPtr=&y;
   
10.     cout<<"[對調前]"<<endl;
    
11.     cout<<"x="<<*xPtr<<endl;
    
12.     cout<<"y="<<*yPtr<<endl;
    
13.     cout<<"變數x的位址: "<<xPtr<<endl;
    
14.     cout<<"變數y的位址: "<<yPtr<<endl<<endl;
    
15.     xPtr=&y;
    
16.     yPtr=&x;
    
17.     cout<<"[對調後]"<<endl;
    
18.     cout<<"x="<<*xPtr<<endl;
    
19.     cout<<"y="<<*yPtr<<endl;
    
20.     cout<<"變數x的位址: "<<xPtr<<endl;
    
21.     cout<<"變數y的位址: "<<yPtr<<endl;
    
22.     system("pause");   
    
23.     return 0;
    
24. }

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