fork(1) download
copy 
  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     char buf[99];
  5.     int idx, n;
  6. 	while (fgets(buf, sizeof buf, stdin)) {
  7.         buf[strcspn(buf, "\n")] = 0; // remove ENTER
  8.         if (sscanf(buf, "%*[^[][%d%n", &idx, &n) != 1) {
  9.             printf("no number in %s\n", buf);
  10.         } else {
  11.             printf("number found: %d (left over string: \"%s\")\n", idx, buf + n);
  12.         }
  13.     }
  14. 	return 0;
  15. }
  16.  
Success #stdin #stdout 0s 9424KB
comments (?)
stdin
copy 
foo[42]
foo[43
[44]]]]]]
[[[45
[[[46]]]
quux
stdout
copy 
number found: 42 (left over string: "]")
number found: 43 (left over string: "")
no number in [44]]]]]]
no number in [[[45
no number in [[[46]]]
no number in quux
https://ideone.com/gC2G4m
read [42]
language:
C (gcc 8.3)
created:
5 years ago
visibility:
secret

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!