memset

Sets n bytes of a buffer to a given character.

void *memset( void *buffer, int c, size_t n); 

Return Values

Returns buffer, pointer to block of data to be filled with c.

For memset details, refer to your C language documentation.

Example

The following example uses memset to fill a structure, about_app, with zeros, before initializing it.

#include <string.h>

struct about_app {
     char *version;
     int field1;
     int field2;
};

// Global scope 
     struct about_app a; 
     a.field1 = 12;
     a.field2 = 13;

// Set all fields to 0 
     memset(&a, 0, sizeof(struct about_app)); 

// Show that fields are set to 0
     lr_output_message("After memset field1=%d field2=%d", a.field1, a.field2);

// Initialize the structure 
     a.version = "app version 1.0";
     a.field1 = 5;
     a.field2 = 6;
     lr_output_message("Now, field1=%d field2=%d", a.field1, a.field2);

Example: Output:
Action.c(18): After memset field1=0 field2=0
Action.c(23): Now, field1=5 field2=6