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C++ cstring strspn() function

❮ CString Functions

Example

Measure the length of the string up to the first non-digit:

char myStr[] = "4096 bytes should be enough";
int pos = strspn(myStr, "0123456789");
cout << pos;
Try it Yourself »

Definition and Usage

The strspn() function searches for the first character in a C-style string which does not match any of the specified characters and returns the length of the string up to that point.

The strspn() function is defined in the <cstring> header file.

Syntax

strspn(void * str, void * search);

Parameter Values

Parameter Description
str Required. The string to search in.
search Required. A string containing a set of characters to search for.

Technical Details

Returns: An integer indicating the position of the first character which does not match any of the search characters.

❮ CString Functions