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CppStrlen

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(C++) std::strlen

Standard function to get the length of a char* (a C-style or null-terminated string) not including the \0 terminator.

include <cstring>

include <iostream>


int main()
{
  const char * const myString = "Bilderbikkel";
  const int length = std::strlen(myString);
  std::cout << "Length is " << length << std::endl;
}

It is similar to the std::string::size method of a std::string. The code below shows this:

include <cstring>

include <string>

include <cassert>


int main()
{
  const std::string myString = "Bilderbikkel";
  const int lengthCppStyle = myString.size();
  const int lengthCstyle = std::strlen(myString.c_str());
  assert(lengthCstyle == lengthCppStyle);
}

Use std::string instead of an array of char [1,2].

Code links

• #include
• char
• const
• cout, std::cout
• cstring (header file)
• endl, std::endl
• include, #include
• int
• iostream (header file)
• main
• std::cout
• std::endl

Reference

• 1) Bjarne Stroustrup. The C++ Programming Language (3rd edition).ISBN: 0-201-88954-4 Chapter 5.8.5: 'Use string rather then zero-terminated arrays of char'.
• 2) Herb Sutter and Andrei Alexandrescu. C++ coding standards: 101 rules, guidelines, and best practices. ISBN: 0-32-111358-6. Chapter 77: 'Use vector and string instead of arrays.'

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