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18. [precautions for pointer pointing to two-dimensional array]

2022-07-21 20:45:00 【Li is struggling】

【 The pointer points to a two-dimensional array p=&a[0][0]】

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

 int a[2][2] = {1,2,3,4};

 int* p;

 p = &a[0][0];

 for (int i = 0; i < 4; i++)

 {

  cout << setw(2) << *(p+i) ;

 }

 return 0;

}

6cd6d3a469d54b2693a903fdfa02f07b.png

 【 Pointer to two-dimensional array cannot be used *p＝a[0]】

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

 int a[2][2] = {1,2,3,4};

 int* p;

 *p = a[0];

 for (int i = 0; i < 4; i++)

 {

  cout << setw(2) << *(p+i) ;

 }

 return 0;

}

95cf0af45cf54a448843048c6a61c9ca.png

 

 

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