Example: sizeof
The following example uses the memset function to fill a structure, about_app, with zeros before initializing it. The return value of sizeof is used as a parameter to memset, to precisely calculate the size of the structure to be filled.
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 zero memset(&a, 0, sizeof(struct about_app));
// Display the field values (0)
lr_output_message ("After memset field1=%d field2=%d", a.field1, a.field2); 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