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Function returning pointers


Code ResourceAuthor: Subashini  

Difficulty Level:

Published: 7th Nov 2006   Read: 7237 times  

Filed in: C++
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Examples for differentiating function pointers and function returning pointers.

 


Sample Code
  1.  
  2. #include<iostream>
  3. using namespace std;
  4. main()
  5. {
  6.         int * add(int,int);
  7.         int *ptr;
  8.         int x,y;
  9.         cin>>x>>y;
  10.         ptr=add(x,y);//address of the result variable is assigned to ptr
  11.         cout<<"result is"<<*ptr;       
  12. }
  13. int *add(int a,int b)
  14. {
  15. int c=a+b;
  16. return(&c);
  17. }
  18.  
  19. #include<iostream>
  20. using namespace std;
  21. main()
  22. {
  23. int add(int,int);
  24. int (*ptr)(int,int);//declaring function pointer
  25. int x,y,result;
  26. cin>>x>>y;
  27. ptr=add  //address of the function is assinged to ptr
  28. result=(*ptr)(x,y);
  29. }
  30.  
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