function
strcspn
<cstring>
size_t strcspn ( const char * str1, const char * str2 );
Get span until character in string
Scans
str1 for the first occurrence of any of the characters that are part of
str2, returning the number of characters of
str1 read before this first occurrence.
The search includes the terminating null-characters, so the function will return the length of
str1 if none of the characters of
str2 are found in
str1.
Parameters
- str1
- C string to be scanned.
- str2
- C string containing the characters to match.
Return value
The length of the initial part of
str1 not containing any of the characters that are part of
str2.
This is the length of
str1 if none of the characters in
str2 are found in
str1.
Example
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/* strcspn example */
#include <stdio.h>
#include <string.h>
int main ()
{
char str[] = "fcba73";
char keys[] = "1234567890";
int i;
i = strcspn (str,keys);
printf ("The first number in str is at position %d.\n",i+1);
return 0;
}
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Output:
The first number in str is at position 5
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See also
- strspn
- Get span of character set in string (function)
- strstr
- Locate substring (function)
- strncmp
- Compare characters of two strings (function)