c++ primer 第六章练习总结

 #include<iostream>using namespace std;int isbigger(const int x1,const int *p1){    if(x1>*p1)        return x1;    else         return *p1;}int main(){ int x1=0,x2=1; int* p1=&x2; cout<<isbigger(x1,p1)<<endl; return 0;}

 /*交换指针*/#include<iostream>using namespace std;void  change(int *&x1,int *&p1)//注意如何引用指针，交换指针，该如何交换，{     int *temp;     temp=x1;     x1=p1;     p1=temp;}int main(){  int x1=0,x2=1; int* p1=&x1 ; int* p2=&x2 ; change(p1,p2); cout<<*p1<<*p2<<endl; return 0;}