Finding the first character in a string that does not belong to a set of characters using strspn() C function

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows 2003 Server Standard Edition

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 (/TC)

Other info:

To do: Finding the first character in a string that does not belong to a set of characters using strspn() C function

To show: How to use the strspn() C function to return the index of the first character in a string that does not belong to a set of characters

// Using strspn()/wcsspn()/_mbsspn()

#include <stdio.h>

#include <string.h>

int main(void)

{

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

char *string2 = "aehilsTuv";

printf(" Using strspn()\n");

printf(" ---------------\n");

printf("string1 = %s\n", string1);

printf("string2 = %s\n", string2);

printf("\nThe length of the initial segment of string1\n");

printf("containing only characters from string2 is = %u\n", strspn(string1, string2));

return 0;

}

Output example:

Using strspn()

---------------

string1 = The initial value is 3.14159

string2 = aehilsTuv

The length of the initial segment of string1

containing only characters from string2 is = 3

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