strspn: returns the index of the first character in *str1 that does not match any of the characters in *str2 : strspn « string.h « C / ANSI-C

1. C / ANSI-C
2. string.h
3. strspn

strspn: returns the index of the first character in *str1 that does not match any of the characters in *str2

    

//Declaration:  size_t strspn(const char *str1, const char *str2); 
//Return:       returns the index of the first character in *str1 that does not match any of the characters in *str2. 

  #include <string.h>
  #include <stdio.h>
  int main(void)
  {
    int len;

    len = strspn("this is a test", "hi");
    printf("%d", len);

    return 0;
  }

         
/*
0*/ 
           
       

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