#include <stdio.h>
typedef union ubox {
int mem1;
int mem2;
double mem3;
} UBox;
int main(void) {
UBox ubx;
ubx.mem1 = 20;
printf("%d \n", ubx.mem2);
ubx.mem3 = 7.15;
printf("%d \n", ubx.mem1);
printf("%d \n", ubx.mem2);
printf("%g \n", ubx.mem3);
return 0;
}
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