Syntax, Example, Strncat( ) function – Echelon Neuron C User Manual

Page 160: Strncmp( ) function

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Functions

Syntax

#include

unsigned long strlen (const char *

);

Example

#include

void f(void)
{

unsigned long length;

length = strlen("Hello, world!");

}

strncat( )

Function

The strncat( ) function appends a copy of the first

len

characters from the string

src

to the end of the string

dest

, and then adds a NUL ('\0') character, resulting

in concatenated strings (thus the name strncat, from string concatenate). If the

src

string is shorter than

len

, no characters are copied past the NUL character.

The function returns a pointer to the string

dest

. See also strcat( ), strchr( ),

strcmp( ), strcpy( ), strlen( ), strncmp( ), strncpy( ), and strrchr( ).
This function cannot be used to copy overlapping areas of memory, or to write
into EEPROM memory or network variables.

Syntax

#include

char *strncat (char *

dest

, char *

src

, unsigned long

len

);

Example

#include

void f(void)
{
char

buf[40]

strncpy(buf, "Hello Beautiful", 16);

strncat(buf, "World News Tonight", 5);

// buf now contains "Hello Beautiful World"

}

strncmp( )

Function

The strncmp( ) function compares the contents of the

and

strings, up to the

NUL ('\0') terminator character in the shorter string, or until

len

characters have

been compared, whichever occurs first. The function performs a case-sensitive
comparison. If the strings match identically, 0 is returned.