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  1. #include <iostream>
  2. #include <string>
  3. #include <regex>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	string a[2] = {"this string contains integer 1423 and character", "100"} ;
  8. 	regex integer("(\\+|-)?[[:digit:]]+");
  9.  
  10. 	for (int i=0; i < sizeof(a)/sizeof(string); i++) {
  11. 		if (regex_match(a[i], integer)) {
  12. 			cout << a[i] << ": contains integer only\n";
  13. 		} else {
  14. 			cout << a[i] << ": doesn't contain integer only\n";
  15. 		}
  16. 	}
  17.  
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 3496KB
comments (?)
stdin 
Standard input is empty
stdout 
this string contains integer 1423 and character: doesn't contain integer only
100: contains integer only
https://ideone.com/hriSPp
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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