The C strspn() function used in C++ program example as the C++ wrapper


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 strspn() C function to returns the index of the first character in a string that does not belong to a set of characters.

To show: How to use the C strspn() function in C++ program as the C++ wrapper




// the strspn() C function as C++ wrapper example

#include <iostream>

#include <string>

using namespace std;


int main(void)


char *string1 = "The initial value is 3.14159";

char *string2 = "aehilsTuv";


cout<<" Using strspn() function"<<endl;

cout<<" ------------------------------"<<endl;

cout<<"string1 = "<<string1<<endl;

cout<<"string2 = "<<string2<<endl;

cout<<endl<<"The length of the initial segment of string1"<<endl;

cout<<"containing only characters from string2 is = "<<strspn(string1, string2)<<endl;


return 0;



Output example:


Using strspn() function


string1 = The initial value is 3.14159

string2 = aehilsTuv

The length of the initial segment of string1

containing only characters from string2 is = 3

Press any key to continue . . .



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