Summary of const with Pointers in C language

  • 2020-05-30 20:50:25
  • OfStack

Summary of const with Pointers in C language

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* the const value cannot be changed; the point can be changed The value of const * can be changed None of const * const can be changed

Example code:

#include <stdio.h>

int main(int argc, const char * argv[])

  // 1  Modifiable pointer 
  const int a = 10;
  int *p = &a;
  *p = 1000;
  printf("*p = %d\n", *p);

  // 2  Modifiable pointer 
  const b = 10;
  int *pb = &b;
  pb = p;
  printf("*pb = %d\n", *pb);

  // 3
  const c = 10;
  int * const pc = &c;
  *pc = 1000;
  //pc = pb; Can't change 

  const d = 10;
  const * int const pd = &d;
  //*pd = 1000;  Can't change 

  return 0;

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