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created by

anonymous

4 minutes ago

​x
 
int main(void) {
  int a = 0, b = 0;
  const int *p = &a;
  int * const q = &a;
​
  *p = 1;
  p = &b;
  *q = 1;
  q = &b;
​
  return 0;
}
​

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$ gcc prog.c -Wall -Wextra -std=c99 -pedantic

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#permlink

Code

[C] gcc 9.1.0

int main(void) {
  int a = 0, b = 0;
  const int *p = &a;
  int * const q = &a;

  *p = 1;
  p = &b;
  *q = 1;
  q = &b;

  return 0;
}

Start

prog.c: In function 'main':
prog.c:6:6: error: assignment of read-only location '*p'
    6 |   *p = 1;
      |      ^
prog.c:9:5: error: assignment of read-only variable 'q'
    9 |   q = &b;
      |     ^

Finish

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