Syntax

#include <string.h>
char *strnset(char *string, int c, size_t n);
char *strset(char *string, int c);

strnset sets, at most, the first n bytes of string to c (converted to a char). If n is greater than the length of string, the length of string is used in place of n. strset sets all bytes of string, except the ending null character (\0), to c (converted to a char).

For both functions, the string must be initialized and must end with a null character (\0).

Both strset and strnset return a pointer to the altered string. There is no error return value.

In this example, strnset sets not more than four bytes of a string to the byte 'x'. Then the strset function changes any non-null bytes of the string to the byte 'k'.

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

int main(void)
{
   char *str = "abcdefghi";

   printf("This is the string: %s\n", str);
   printf("This is the string after strnset: %s\n", strnset(str, 'x', 4));
   printf("This is the string after strset: %s\n", strset(str, 'k'));
   return 0;

   /****************************************************************************
      The output should be:

      This is the string: abcdefghi
      This is the string after strnset: xxxxefghi
      This is the string after strset: kkkkkkkkk
   ****************************************************************************/
}

• strchr
  
• strpbrk
  
• wcschr
  
• wcspbrk

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