The function pointeroperationis used to call either theaddorsubtractfunction, depending on what is passed tocompute. Inmain,computeis called twice: once with theaddfunction pointer and once with thesubtractfunction pointer. Example 3: Array of Function Pointers This example demonstrates how to use ...
and then you could pass in a pointer to an instance of the AscendSorter to cpp_qsort to sort integers in ascending order. But Are You Really Not Using Function Pointers? Virtual functions are implemented behind the scenes using function pointers, so you really are using function pointers--...
#include<iostream>usingnamespacestd;voidprintname(char*name){std::cout<<"Name is:"<<name<<std::endl; }intmain(){chars[20];// array declarationvoid(*ptr)(char*);// function pointer declarationptr=printname;// storing the address of printname in ptr.std::cout<<"Enter the name of th...
In this example, foo is a pointer to a function taking one argument, an integer, and that returns void. It's as if you're declaring a function called "*foo", which takes an int and returns void; now, if *foo is a function, then foo must be a pointer to a function. (Similarly,...
In this example, we have two functions, add and multiply, that perform addition and multiplication, respectively. The calculate function takes two integers and a function pointer as arguments, allowing us to perform either addition or multiplication. We demonstrate this by using function pointers, ad...
C++ - Sort an array in Ascending Order C++ - Convert lowercase to uppercase & vice versa C++ - Check leap year C++ - Check if a number is even using Recursion C++ - Find odd or even number without using modulus operator C++ - Check EVEN or ODD C++ - Add two times C++ - Display pr...
Method 1: Returning a Pointer to a Dynamically Allocated Array Method 2: Using std::array Method 3: Using std::vector Conclusion FAQ Returning an array from a function in C++ can be a bit tricky, especially for those new to the language. Unlike some other programming languages, C++...
C++ - Function returning reference: Here, we will learn with a C++ program, how to return a reference from function? What is Function Returning Reference in C++? As we know that we can take only variable on the left side in C++ statements, we can also use a function on the left side...
Additionally, you used new[] to allocate an array, but you never called delete[] on that memory. You have a memory leak. Consider using std::vector in the future; it is essentially an array but will manage the memory for you. To assign to a variable that holds a function pointer, yo...
Edit & run on cpp.sh It works in main(), so I hope I can do the same thing in a function. What I mean is that I won't know the value of ARRAY constant if I'm going to use eleArray() in other source codes, so I want to obtain it!