CPP - Array As Arguments

/**

 * A. This uses common array functionality and symbolism

 */

#include <iostream>

using namespace std;

#include <ctime>
#include <cstdlib>

void setAges(int ages[], int len){
    int newAge[] = {10,20,30,40};
    int i;
    for(i=0; i< len; i++){
          ages[i] = newAge[i];
    }
}

int main()
{
    int age[] = {1,2,3,5};
    setAges(age, 4);
    int i;
    for(i=0;i<4;i++){
        cout << age[i] << endl;
    }
    return 0;
}

/**

 * B. Or by using the power of pointer, we can do also exactly like

 * the above

 */

#include <iostream>

using namespace std;

#include <ctime>
#include <cstdlib>

void setAges(int *ref, int len){
    int newAge[] = {10,20,30,40};
    int i;

    for(i=0; i< len; i++){
          *( ref + i) = newAge[i]  ;
    }
}

int main()
{
    int age[] = {1,2,3,5};
    setAges(age, 4);
    int i;
    for(i=0;i<4;i++){
        cout << age[i] << endl;
    }
    return 0;
}

/**

 * C. In this form, the calling parameter argument is used as the

 * first array index

 */

#include <iostream>

using namespace std;

#include <ctime>
#include <cstdlib>

void setAges(int *ref, int len){
    int newAge[] = {10,20,30,40};
    int i;

    for(i=0; i< len; i++){
          *( ref + i) = newAge[i]  ;
    }
}

int main()
{
    int age[] = {1,2,3,5};
    setAges(&age[0], 4);
    int i;
    for(i=0;i<4;i++){
        cout << age[i] << endl;
    }
    return 0;
}

CPP - Array As Arguments