The purpose of pointer parameters of C++ functions

Pointer parameters to

C functions allow you to make function behavior more flexible. Pointer parameters are used as input to a function and provide dynamic mutability to the function. Pointer parameters allow a function to manipulate the value of the variable pointed to by the pointer. This improves efficiency and increases code abstraction and reusability.

C中，指针参数可以作为函数入参使用，它可以为函数提供动态的可变化性。

函数原型

void func(int* ptr);

上Different types of actions func

，它接收一个指向

int 类type变量的指针作为参数。Using method

在函数调用中，一个指针变量可以传针变量：

int x = 10;
func(&x);

调用

func

函数时，将

x Local location (&x) It's a big deal. 。Complete conclusion

How to adjust the method

void sortArray(int* array, int size) {
  // 排序数组
  // ...
}

int main() {
  int myArray[] = {5, 2, 7, 1, 3};
  const int size = sizeof(myArray) / sizeof(myArray[0]);
  sortArray(myArray, size);
  // 打印排序后的数组
  for (int i = 0; i < size; i++) {
    cout << myArray[i] << " ";
  }
  return 0;
}

After the first step, sortArray

Return to action一个指向数组的指针和数组大小作为参数，从而可以对数组进行排序和其他操作。

优点

可变性：

指针参数允许函数操作不的数据，无需更改函数本身。
• 效率：
使用指针避免了数据的复Rule of thumb.
• 抽象：
It is easy to understand the size of the market, it is easy to use, it is easy to use, and it is easy to use.
注意事项

##确保传递给指针参数的地址有效。

小心指针空引用，尤其是在指针指向

NULL
• 或
nullptr
• 时。 It is possible to change the local market and change the local market.

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