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May 19th, 2019
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C++ 0.36 KB | None | 0 0
  1. #include <iostream>
  2. #include <cstring>
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.     char str[51];
  9.     cin.getline(str, 50);
  10.     for(int i = 0; i < strlen(str); i++){
  11.         if(islower(str[i])){
  12.             str[i] = toupper(str[i]);
  13.         } else if (isupper(str[i])){
  14.             str[i] = tolower(str[i]);
  15.         }
  16.     }
  17.     cout << str;
  18.     return 0;
  19. }
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