fork download 
  1. #include <stdio.h>
  2.  
  3. void foo(int i)
  4. {
  5.     static const void *sw[] = { &&lab_0, &&lab_1, &&lab_2 };
  6.  
  7.     if (i < 0 || i >= sizeof(sw)/sizeof(*sw)) {
  8.         printf("out of range\n");
  9.         return;
  10.     }
  11.  
  12.     goto *sw[i];
  13.  
  14. lab_0:
  15.     printf("lab_0\n");
  16.     return;
  17.  
  18. lab_1:
  19.     printf("lab_1\n");
  20.     return;
  21.  
  22. lab_2:
  23.     printf("lab_2\n");
  24.     return;
  25.  
  26. }
  27.  
  28. int main(void) {
  29. 	for (int i = -1; i < 4; ++i)
  30. 	    foo(i);
  31. 	return 0;
  32. }
  33.  
Success #stdin #stdout 0s 4500KB
comments (?)
stdin 
Standard input is empty
stdout 
out of range
lab_0
lab_1
lab_2
out of range
https://ideone.com/rEAHNt
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!