The function strncmp () in C

The function int strncmp (const char * str1, const char * str2, size_t n) compares the first n bytes of str1 and str2.

Table of Contents

Declaring the function strncmp () in C
Parameters
Returns the value
For example

The function int strncmp (const char * str1, const char * str2, size_t n) compares the first n bytes of str1 and str2.

Declaring the function strncmp () in C

Below is the declaration for strncmp () in C:

 int  strncmp ( const char * str1 , const char * str2 , size_t  n )

Parameters

str1 - This is the first string to be compared.

str2 - This is the second string to be compared.

n - Maximum number of characters to be compared.

Returns the value

This function returns the following values:

If the value returns <0, this function indicates that str1 is shorter than str2.

If the value returns> 0, this function indicates that str2 is shorter than str1.

If the return value = 0, this function indicates that str1 is equal to str2.

For example

The following C program illustrates the usage of strncmp () in C:

 #include #include int  main  () { char  str1 [ 15 ]; char  str2 [ 15 ]; int  ret ;  strcpy ( str1 , "abcdef" );  strcpy ( str2 , "ABCDEF" );  ret  =  strncmp ( str1 ,  str2 , 4 ); if ( ret  < 0 ) {  printf ( "Chuoi str1 la ngan hon chuoi str2" ); } else if ( ret  > 0 ) {  printf ( "Chuoi str2 la ngan hon chuoi str1" ); } else {  printf ( "Chuoi str1 la bang chuoi str2" ); } return ( 0 ); }

Compiling and running the above C program will result: