c++指针和引用两种方式实现值传递

指针方式：#include<iostream>

void exchange(int *x, int *y)
{
int temp = *x;
*x = *y;
*y = temp;
}

int main()
{
int a = 6, b = 4;
exchange(&a, &b);

system("pause");
return 0;

}

引用方式：#include<iostream>

void exchange(int &x, int &y)
{
int temp = x;
x = y;
y = temp;
}

int main()
{
int a = 6, b = 4;
exchange(a, b);

system("pause");
return 0;

}

注意事项：
注意指针传值和引用传值调用传值函数时候形参赋值形式必须符合指针或引用的定义。