Question

How to pass the address of a pointer to a function in C++

Answer 1

#include <iostream>
 
void changeValue(int** p) {
    **p = 700;
}
   
int main()
{
    int n = 12;
    int* p = &n;
   
    std::cout << *p << " " << n << "\n";
   
    changeValue(&p);
   
    std::cout << *p << " " << n << "\n";
}
      
      
      
      
/*
run:
    
12 12
700 700
       
*/

 

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