strspn

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

Find a prefix substring in a string consisting entirely of characters in a specified character set.

Syntax

size_t strspn( LPCSTR lpcszString, LPCSTR lpcszCharSet )

Parameters

lpcszString: [input] String to search through
lpcszCharSet: [input] String containing specified character set

Return

Returns the index (based from 0) of the first character in a string that is not in a specified character set. All characters before returned index are in the character set.

Examples

EX1

void strspn_ex1()
{
    char str1[] = "Mississippi";

    out_int("", strspn( str1, "Mis" )); // The output is 8
    out_int("", strspn( str1, "Misp" )); //The output is 11
    out_int("", strspn( str1, "mIS" )); //The output is 0
}