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  1. #include <iostream>
  2. #include <cctype>
  3.  
  4. const char* max_word(const char* s, const char*& e, int& n){
  5. 	int k, l, i;
  6. 	const char* p, *m, *t = s;
  7.  
  8. 	m = NULL;
  9. 	i = 1;
  10. 	for(n = k = 0; *s; ++s){
  11. 		if(std::isalpha(*s) && ! std::isalpha(*(s + 1))){
  12. 			p = s - 1;
  13. 			while((p >= t) && std::isalpha(*p))
  14. 				--p;
  15. 			++p;
  16. 			l = (int)(s - p);
  17. 			if(l > k){
  18. 				k = l;
  19. 				n = i;
  20. 				m = p;
  21. 				e = s + 1;
  22. 			}
  23. 			++i;
  24. 		}
  25. 	}
  26. 	return m;
  27. }
  28.  
  29.  
  30. int main(void){
  31. 	char s[] = "begin: saturn,  [jupiter], neptun, uran.";
  32.  
  33. 	int n;
  34. 	const char* e;
  35. 	const char* w = max_word(s, e, n);
  36. 	if(w != NULL){
  37. 		std::cout << "word:   ";
  38. 		std::cout.write(w, (int)(e - w));
  39. 		std::cout << std::endl;
  40.  
  41. 		std::cout << "index:  " << (size_t)(w - s) << std::endl;
  42. 		std::cout << "number: " << n << std::endl;
  43. 		std::cout << "substr: " << w << std::endl;
  44. 	}
  45. 	return 0;
  46. }
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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word:   jupiter
index:  17
number: 3
substr: jupiter], neptun, uran.
https://ideone.com/tr52bs
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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