Explain stremp()function

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.

Code:

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

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Parameters

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

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

Return Value

This function returned values are as follows:

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

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

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

Example

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

Code:

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#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);
}

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

Code:

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str1 is less than str2

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