The C++ char_traits member function, find() to search a string in a forward direction for the first occurrence of a substring that matches a specified sequence of characters program example

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional library: none/default

Additional project setting: Set project to be compiled as C++

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C++ Code (/TP)

Other info: none

To do: Using the find() member function to search a string in a forward direction for the first occurrence of a substring that matches a specified sequence of characters

To show: How to search a string in a forward direction for the first occurrence of a substring that matches a specified sequence of characters using find() member function

 

// the C++ char_traits, find() example

#include <string>

#include <iostream>

using namespace std;

 

int main(void)

{

const char* result1;

const char* result2;

 

const char* str = "Testing the char_traits, find()";

cout<<"The string to be searched is:\n"<<str<<endl;

 

// searching for an 'a' in the first 20 positions of string str

cout<<"\nOperation: find(str, 20, 'a')"<<endl;

result1 = char_traits<char>::find(str, 20, 'a');

cout<<"Searching character \'"<<*result1<<"\'."<<endl;

cout<<"The string beginning with the first occurrence\n"

<<"of the character 'a' is: "<<result1<<endl;

 

// when no match is found the NULL value is returned

result2 = char_traits<char>::find(str, 20, 'z');

cout<<"\nOperation: find(str, 20, 'z')"<<endl;

if(result2 == NULL)

cout<<"The character 'z' was not found."<<endl;

else

cout<<"The result of the search is: "<<result2<<endl;

 

return 0;

}

 

Output example:

 

The string to be searched is:

Testing the char_traits, find()

 

Operation: find(str, 20, 'a')

Searching character 'a'.

The string beginning with the first occurrence

of the character 'a' is: ar_traits, find()

 

Operation: find(str, 20, 'z')

The character 'z' was not found.

Press any key to continue . . .

 

 

C and C++ Programming Resources | C & C++ Code Example Index