What five things could I do to improve this code?

I'm thinking one of them could be to add fclose(pKeyFile)?

let me know if this is correct and also what the other improvements would be.

#include stdio.h void getKey(char *pKey, int length) { FILE *pKeyFile; pKeyFile = fopen(/dev/random,r); fread(pKey, 1, length, pKeyFile); } int main(void) { char key[4]; getKey(key, sizeof(key); return 0; }