C++函数参数传递的三种方式

//1. 值传递
void mySwap01(int a, int b) {
  int temp = a;
  a = b;
  b = temp;
}
//2. 地址传递
void mySwap02(int* a, int* b) {
  int temp = *a;
  *a = *b;
  *b = temp;
}
//3. 引用传递
void mySwap03(int& a, int& b) {
  int temp = a;
  a = b;
  b = temp;
}
int main() {
  int a = 10;
  int b = 20;
  mySwap01(a, b);
  cout << "a:" << a << " b:" << b << endl;
  mySwap02(&a, &b);
  cout << "a:" << a << " b:" << b << endl;
  mySwap03(a, b);
  cout << "a:" << a << " b:" << b << endl;
  system("pause");
  return 0;
}