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The C programming language made simple

What are unions in C?

#include <stdio.h> #include <stdlib.h> #include <string.h> typedef union Example { long long num; char bytes[8]; float floats[2]; } Example; int main(int argc, char* argv[]) { Example e; e.bytes[0] = 17; printf("%lld\n", e.num); for (int i = 0; i < 8; i++) { printf("%02hhx ", e.bytes[i]); } return 0; }