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  1. #include <regex.h>
  2. #include <stdio.h>
  3.  
  4. int validate_var(char *str)
  5. {
  6.     regex_t reg;
  7.     printf("error code %d\n" ,regcomp(&reg, "^[a-zA-Z]+[a-zA-Z0-9]*$", 0));
  8.     int r = regexec(&reg, str, 0, NULL, 0);
  9.     regfree(&reg);
  10.  
  11.     return r;
  12. }
  13.  
  14. int main() {
  15.     printf("%d\n", validate_var("abc")); // Reports 1, This makes sense
  16.     printf("%d\n", validate_var("17"));  // Reports 1, This doesn't make sense
  17. }
Runtime error #stdin #stdout 0s 2140KB
comments (?)
stdin 
Standard input is empty
stdout 
error code 0
1
error code 0
1
https://ideone.com/xbLLgz
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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