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  1. #include <stdio.h>
  2. #include <setjmp.h>
  3. #include <stdlib.h>
  4. #include <signal.h>
  5.  
  6. jmp_buf env;
  7.  
  8. void handler(int s) {
  9.     signal(SIGSEGV, handler);
  10.     longjmp(env, 1);
  11. }
  12.  
  13. int main() {
  14.     int a[2][2] = {{0, 1}, {2, 3}};
  15.     int retval;
  16.     signal(SIGSEGV, handler);
  17.     if (setjmp(env) == 0) {
  18.         retval = **a;
  19.         puts("a[2][2] is a[2][2]");
  20.     } else puts("a[2][2] is not a[2][2]");
  21.     if (setjmp(env) == 0) {
  22.         retval = **((int **) a);
  23.         puts("a[2][2] is *a[2]");
  24.     } else puts("a[2][2] is not *a[2]");
  25.     return retval;
  26. }
  27.  
Success #stdin #stdout 0.02s 1676KB
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stdin
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Standard input is empty
stdout
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a[2][2] is a[2][2]
a[2][2] is not *a[2]
https://ideone.com/voIRG
language:
C99 (gcc 8.3)
created:
13 years ago
visibility:
public

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