### strncpy -- Copy Strings

Format

>     #include <string.h>
>     char *strncpy(char *string1, const char *string2, size_t count);

Language Level: ANSI, POSIX, XPG4
strncpy copies count characters of string2 to string1. If count is less than or equal to the length of string2, a null character (\0) is not appended to the copied string. If count is greater than the length of string2, the string1 result is padded with null characters (\0) up to length count.

Return Value
strncpy returns a pointer to string1.

Example
This example demonstrates the difference between strcpy and strncpy.

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

    #define SIZE    40

    int main(void)
    {
      char source[ SIZE ] = "123456789";
      char source1[ SIZE ] = "123456789";
      char destination[ SIZE ] = "abcdefg";
      char destination1[ SIZE ] = "abcdefg";
      char * return_string;
      int    index = 5;

      /* This is how strcpy works */
      printf( "destination is originally = '%s'\n", destination );
      return_string = strcpy( destination, source );
      printf( "After strcpy, destination becomes '%s'\n\n", destination );

      /* This is how strncpy works */
      printf( "destination1 is originally = '%s'\n", destination1 );
      return_string = strncpy( destination1, source1, index );
      printf( "After strncpy, destination1 becomes '%s'\n", destination1 );
      return 0;

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

         destination is originally = 'abcdefg'
         After strcpy, destination becomes '123456789'

         destination1 is originally = 'abcdefg'
         After strncpy, destination1 becomes '12345fg'

      ******************************************************************/
    }

strcpy -- Copy Strings
strdup -- Duplicate String
strncat -- Concatenate Strings
strncmp -- Compare Strings
strnicmp -- Compare Strings Without Case Sensitivity
strpbrk -- Find Characters in String
strrchr -- Find Last Occurrence of Character in String
strspn -- Search Strings
<string.h>