strcmp()

Compares two character strings.

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

s1

The string to compare.

s2

The comparison string.

This function compares the character array pointed to by s1 to the character array pointed to by s2. The function starts at the beginning of each and stops the comparison when it reaches a null character in s1 or s2. Both strings must be null terminated character arrays. 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>

#define MAX 20

int main (void)

{

char s1[] = "butter";

char s2[] = "olive oil";

char dest[MAX];

if (strcmp(s1, s2) < 0)

strcpy(dest, s2);

else

strcpy(dest, s1);

printf(" s1=%s\n s2=%s\n dest=%s\n", s1, s2, dest);

return 0;

}

Output:

s1=butter

s2=olive oil

dest=olive oil