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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. int ishyphen(int ch) {
  5. 	return ch == '-';
  6. }
  7.  
  8. int isdate(const char *s) {
  9. 	unsigned q;
  10. 	int (*f[])(int)= {
  11. 		isdigit, isdigit, isdigit, isdigit, ishyphen,
  12. 		isdigit, isdigit, ishyphen,
  13. 		isdigit, isdigit
  14. 	};
  15.  
  16. 	for (q=0; q < sizeof f / sizeof *f; ++q)
  17. 		if (!f[q](s[q]))
  18. 			return 0;
  19.  
  20. 	return !s[q];
  21. }
  22.  
  23. int main(void) {
  24. 	char s[256];
  25.  
  26. 	while(gets(s)) {
  27. 		printf("%s - %s\n", s, isdate(s) ? "yes" : "no");
  28. 	}
  29.  
  30. 	return 0;
  31. }
  32.  
Success #stdin #stdout 0s 2116KB
comments (?)
stdin
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2015-09-01
2015-08-aa
2012/08-26
2015-08-_26
2012/aa-26
2012--8-26
2012=08-26
2014-028-26
2011-(8-26
2011-(--26
2011----26
2311-(8-26
stdout
copy 
2015-09-01 - yes
2015-08-aa - no
2012/08-26 - no
2015-08-_26 - no
2012/aa-26 - no
2012--8-26 - no
2012=08-26 - no
2014-028-26 - no
2011-(8-26 - no
2011-(--26 - no
2011----26 - no
2311-(8-26 - no
https://ideone.com/rWfEMI
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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