C library functions - strcspn ()

C standard library - <string.h>

description

C library functionssize_t strcspn (const char * str1, const char * str2) at the beginning of a continuous string str1retrieve a few characters do not contain the string of characters instr2.

statement

Here is strcspn () function's declaration.

size_t strcspn(const char *str1, const char *str2)

parameter

• str1 - C strings to be retrieved.
• str2 - the string contains a list of characters to be matched in the str1.

return value

This function returns the beginning of str1 does not contain the number of characters in a row are the characters in str2.

Examples

The following example demonstrates strcspn () function is used.

#include <stdio.h>
#include <string.h>


int main ()
{
   int len;
   const char str1[] = "ABCDEF4960910";
   const char str2[] = "013";

   len = strcspn(str1, str2);

   printf("第一个匹配的字符是在 %d\n", len + 1);
   
   return(0);
}

Let's compile and run the above program, which will result in the following:

第一个匹配的字符是在 10

C standard library - <string.h>