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  1.     #include <algorithm>
  2.     #include <cctype>
  3.     #include <string>
  4.     #include <iostream>
  5.  
  6.     using namespace std;
  7.     int main()
  8.     {
  9.         string text = "Abc123DEfHello";
  10.         cout << text <<  "\n";
  11.         //...
  12.         std::transform(text.begin(), text.end(), text.begin(), [](char c) 
  13.           { return isupper(c)?tolower(c):toupper(c); });
  14.         cout << text <<  "\n";
  15.     }
Success #stdin #stdout 0s 3272KB
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stdin
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Standard input is empty
stdout
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Abc123DEfHello
aBC123deFhELLO
https://ideone.com/PJmc1b
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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