A small program for understanding unions in C

Asked Apr 15 '13 at 16:29

Active Apr 15 '13 at 16:35

Viewed 54 times

typedef union{
    int a;  
    char b[10];
    float c;     
} Union;

int main()
{
    Union x,y={100};

    x.a=10;
    strcpy(x.b,"hello");
    x.c=21.50;

    printf("%d\t%s\t%f\n",x.a,x.b,x.c);
    printf("%d\t%s\t%f\n",y.a,y.b,y.c);
    return 0;
}

I have this program where I am able to make out all the outputs except for "x.a" and "y.c". Both these outputs are a bit confusing. I do know that floats are stored in memory in a different way as compared to int, but still I am unable to make out the possible reasons for the output.

Any help will be appreciated.

The outputs are

110792132                21.500000
100           d          0.000000

edited Apr 15 '13 at 16:35

Robᵩ

163,533
20
239
308

asked Apr 15 '13 at 16:29

gst

1,251
1
14
32

2

So what are the outputs you get? What are the outputs you expect to get? – Shahbaz Apr 15 '13 at 16:30
Is there a specific question in here somewhere. – Lawrence Dol Apr 15 '13 at 16:32
@SoftwareMonkey - No. There is, in fact, no question at all. All of OP's sentences are statements, none are questions. – Robᵩ Apr 15 '13 at 16:34
And, the duplicate question will do so - note that searching for a similar answer is far preferable to simply asking each question as it occurs to you. – KevinDTimm Apr 15 '13 at 16:43

A small program for understanding unions in C

0 Answers0