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  1. #include <stdio.h>
  2.  
  3. int main (int argc, char *argv[])
  4. {
  5.  
  6.     unsigned long int id = 0;
  7.  
  8.     id = strtoul(argv[1], NULL, 16);
  9.     printf("value: %lx\n", id);
  10.  
  11.     return 0;
  12. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.c: In function 'main':
prog.c:8:10: error: implicit declaration of function 'strtoul' [-Werror=implicit-function-declaration]
     id = strtoul(argv[1], NULL, 16);
          ^
cc1: all warnings being treated as errors
stdout
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Standard output is empty
https://ideone.com/Z1uz5R
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

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