orders two arguments using pointers : function pointers « Function « C++ Tutorial

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2. Function
3. function pointers

#include <iostream>  
  using namespace std;  
    
  int main(){  
     void order(int*, int*); 
    
     int n1=99, n2=11;       
     int n3=22, n4=88;  
    
     order(&n1, &n2);        
     order(&n3, &n4);  
    
     cout << "n1=" << n1 << endl;  
     cout << "n2=" << n2 << endl;  
     cout << "n3=" << n3 << endl;  
     cout << "n4=" << n4 << endl;  
     return 0;  
    }  

  void order(int* numb1, int* numb2){  
     if(*numb1 > *numb2){  
        int temp = *numb1;          
        *numb1 = *numb2;  
        *numb2 = temp;  
     }  
  }