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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <string>
  4.  
  5. // Sum the characters in a c-style string.
  6. int cStringSum( const char * str )
  7. {
  8.     int sum = 0;
  9.     // Loop while we haven't hit the terminating '\0' char.
  10.     while ( '\0' != *str )
  11.     {
  12.         // Add the current char to the sum.
  13.         sum += *str;
  14.         ++str;
  15.     }
  16.     return sum;
  17. }
  18.  
  19. // Sum the characters in a c++ string.
  20. int stringSum( const std::string & str )
  21. {
  22.     int lim = str.size();
  23.     int sum = 0;
  24.     // Use a normal loop over the number of characters.
  25.     for ( int pos = 0; pos < lim; ++pos )
  26.     {
  27.         // Add the current char to the sum.
  28.         sum += str[pos];
  29.     }
  30.     return sum;
  31. }
  32.  
  33. int main()
  34. {
  35.     // For decimal output.
  36.     std::cout << cStringSum("abc") << "\n";
  37.     std::cout << stringSum("abc") << "\n";
  38.  
  39.     // For hex output.
  40.     std::cout << std::hex;
  41.     std::cout << cStringSum("abc") << "\n";
  42.     std::cout << stringSum("abc") << "\n";
  43.  
  44.     return 0;
  45. }
Success #stdin #stdout 0.01s 2812KB
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https://ideone.com/dqIE5
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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