Question

I have a static array in c defined like this:

typedef struct
{
int a;
int b;
int c;
int d;
} Hello;

static Hello hello[6] = {{0}}; 

then at some points I need to reset all the attributes of each elements in this static array to 0; how to do this?

Answer 1

You need to use memset():

#include <string.h>
memset(hello, 0, sizeof hello);

Note that this only works since “all bits 0” is a pretty safe assumption for setting int variables to 0. If hello had contained e.g. floats or pointers, that assumption doesn’t hold at all and you would have to do a manual loop.