程序代码：

#include <iostream>
using namespace std;

int func(int a,int *b,int *c);
int main()
{
    int a=1,b=2,c=3;
    cout<<"主程序，调用func函数前...\n";
    cout<<"a:"<<a<<endl<<" b:"<<b<<endl;<<" c:"<<c<<endl;
    func(a,&b,&c);
    cout<<"主程序，调用func函数后...\n";
    cout<<"a:"<<a<<endl<<" b:"<<b<<endl;<<" c:"<<c<<endl;
    return 0;
}
int func(int a,int *b,int *c)
{
    cout<<"func函数中，计算前...\n";
    cout<<"a:"<<a<<endl<<" b:"<<*b<<endl<<" c:"<<*c<<endl;
    a++;
    *b=(*b)*(*b);  
    *c=(*c)*(*c)*(*c);
    cout<<"func函数中，计算后...\n";
    cout<<"a:"<<a<<endl<<" b:"<<*b<<endl<<" c:"<<*c<<endl;
    return a;
}