C library function - strcmp()


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Description

The C library function int strcmp(const char *str1, const char *str2) compares the string pointed to, by str1 to the string pointed to by str2.

Declaration

Following is the declaration for strcmp() function.

int strcmp(const char *str1, const char *str2)

Parameters

  • str1 -- This is the first string to be compared.

  • str2 -- This is the second string to be compared.

Return Value

This function return values that are as follows:

  • if Return value < 0 then it indicates str1 is less than str2.

  • if Return value > 0 then it indicates str2 is less than str1.

  • if Return value = 0 then it indicates str1 is equal to str2.

Example

The following example shows the usage of strncmp() function.

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

int main ()
{
   char str1[15];
   char str2[15];
   int ret;


   strcpy(str1, "abcdef");
   strcpy(str2, "ABCDEF");

   ret = strcmp(str1, str2);

   if(ret < 0)
   {
      printf("str1 is less than str2");
   }
   else if(ret > 0) 
   {
      printf("str2 is less than str1");
   }
   else 
   {
      printf("str1 is equal to str2");
   }
   
   return(0);
}

Let us compile and run the above program that will produce the following result:

str2 is less than str1

string_h.htm

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