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cppstrchr

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(C++) std::strchr

The standard function strchr returns a pointer to the first location of a char in a C-style string. If the char is not found, it returns null.

To obtain a pointer to the last location of a char in a C-style string, use std::strrchr.

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

Declaration

char * strchr ( const char *, int );

Example

include <cstring>

include <cassert>


int main()
{
  const char myString[] = "Bilderbikkel";
  // Find the first 'k'
  const char * const myPointer = std::strchr(myString,'k');
  // Check that it indeed points to a 'k'
  assert(*myPointer == 'k');
  // Check that it indeed points to the first 'k',
  // by checking that the previous position is 'i'
  assert(* (myPointer-1) == 'i');
}

'strchr' links

• C

Code links

• #include
• assert
• cassert (header file)
• cstring (header file)
• char
• const
• #include
• int
• main

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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