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  1.  
  2. #include <iostream>
  3. #include <string.h>
  4. using namespace std;
  5. #define MAX 300
  6.  
  7. int myStrcmp(char s1[], char s2[]);
  8. int myStrlen(char s[], int k);
  9. void myStrcpy(char s[], int vt, char s1[], int k);
  10. void mySubstr(char s[], int b, int count, char ss[]);
  11. bool myStrcat(char s1[], char s2[]);
  12. void StringReverse(char st[]);
  13.  
  14. int main()
  15. {
  16. 	char s[MAX];
  17. 	fgets(s,300,stdin);
  18. 	if (myStrcmp(s, "") == 0)
  19. 		cout << "Chuoi rong." << endl;
  20. 	else
  21. 	{
  22. 		StringReverse(s);
  23. 		cout << s << endl;
  24. 	}
  25. 	return 0;
  26. }
  27.  
  28. int myStrlen(char s[], int k)
  29. {
  30.     k = 0;
  31.     while(s[k] != '\0' && s[k] != '\n')
  32.         k++;
  33.     return k;
  34. }
  35.  
  36. int myStrcmp(char s1[], char s2[])
  37. {
  38.     if(s1[0] == '\n' || s1[0] == '\0')
  39.         return 0;
  40.     return 1;
  41. }
  42.  
  43. void StringReverse(char st[])
  44. {
  45.     int len = myStrlen(st, len), temp;
  46.     bool check = true;
  47.     for(int i = 0; i < len; i++)
  48.         if(st[i] == ' ')
  49.         {
  50.             check = false;
  51.             break;
  52.         }
  53.     if(check)
  54.     {
  55.         for(int i = 0; i < len; i++)
  56.             cout << st[i];
  57.         st[0] = '\0';
  58.         return;
  59.     }
  60.     for(temp = len - 1; temp >= 0; temp--)
  61.     {
  62.         if(st[temp] == ' ')
  63.             break;
  64.     }
  65.     for(int i = temp + 1; i < len; i++)
  66.         cout << st[i];
  67.     cout << ' ';
  68.     for(int i = temp; i >= 0; i--)
  69.         if(st[i] == ' ')
  70.             for(int j = i - 1; j >= 0; j--)
  71.                 if(st[j] == ' ')
  72.                 {
  73.                     for(int k = j + 1; k < i; k++)
  74.                     {
  75.                         cout << st[k];
  76.                     }
  77.                     i = j;
  78.                     cout << ' ';
  79.                 }
  80.     temp = 0;
  81.     while(st[temp] != ' ')
  82.         cout << st[temp++];
  83.     st[0] = '\0';
  84.     return;
  85. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/0jDZJI
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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