strncmp()

Compares up to a maximum number of characters.

  #include <string.h>
  
  int strncmp(const char *s1, const char *s2, size_t n);    

s1

A pointer to the character string to compare.

s2

A pointer to the comparison string.

n

The maximum number of characters to compare.

This function compares n characters of the character array pointed to by s1 to n characters of the character array pointed to by s2. Neither s1 nor s2 needs to be nullterminated character arrays.

The function stops if it reaches a null character before n characters have been compared. The function returns:

• zero if all characters in s1 are identical to and appear in the same order as the characters in s2
• a negative value if the numeric value of first non-matching character in s1 is less than its counterpart in s2
• a positive value if the numeric value of first non-matching character in s1 is greater than its counterpart in s2

This facility may not be available on some configurations of the EWL.

#include <string.h>

#include <stdio.h>

int main(void)

{

char s1[] = "12345anchor";

char s2[] = "12345zebra";

if (strncmp(s1, s2, 5) == 0)

printf("%s is equal to %s\n", s1, s2);

else

printf("%s is not equal to %s\n", s1, s2);

return 0;

}

Output:

12345anchor is equal to 12345zebra