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#include <string.h>

union Data
{
int i;

float f;

char str[20];
};

int main( )
{

union Data data;

data.i = 10;
data.f = 220.5;

strcpy( data.str, "C Programming");

printf( "data.i : %d\n", data.i);
printf( "data.f : %f\n", data.f);

printf( "data.str : %s\n", data.str);

return 0;
}

When the above code is compiled and executed, it produces the following result:

data.i : 1917853763

data.f : 4122360580327794860452759994368.000000
data.str : C Programming

Here, we can see that the values of i and f members of union got corrupted because the
final value assigned to the variable has occupied the memory location and this is the reason that
the value of str member is getting printed very well.
Now let's look into the same example once again where we will use one variable at a time
which is the main purpose of having unions:

#include <stdio.h>

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