C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - Find Output of Program (Q.No. 10)
10.
What is the output of the program?
#include<stdio.h>
int main()
{
union a
{
int i;
char ch[2];
};
union a u;
u.ch[0] = 3;
u.ch[1] = 2;
printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);
return 0;
}
Answer: Option
Explanation:
printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i); It prints the value of u.ch[0] = 3, u.ch[1] = 2 and it prints the value of u.i means the value of entire union size.
So the output is 3, 2, 515.
Discussion:
78 comments Page 4 of 8.
Jenifer said:
1 decade ago
How does the statement printf("%d %d %d", u.ch[0],u.ch[1],u.i); prints the size of union?
Any variable hold some garbage value without initialization.
Here we din't used sizeof operator too then how its calculating the size and printing. Any one please explain?
Any variable hold some garbage value without initialization.
Here we din't used sizeof operator too then how its calculating the size and printing. Any one please explain?
Devang r dixit said:
1 decade ago
Please give output with explanation:
int main()
{
union a
{
int i;
float j;
char ch[2];
};
union a u;
u.ch[0] = 3;
u.ch[1] = 2;
printf("%d, %d, %d, %d\n", u.ch[0], u.ch[1], u.j,u.i);
return 0;
}
int main()
{
union a
{
int i;
float j;
char ch[2];
};
union a u;
u.ch[0] = 3;
u.ch[1] = 2;
printf("%d, %d, %d, %d\n", u.ch[0], u.ch[1], u.j,u.i);
return 0;
}
Ishu said:
1 decade ago
Why value of u?
I means the entire size of union? Can someone help me out?
I means the entire size of union? Can someone help me out?
Ace said:
1 decade ago
#include<stdio.h>
int main()
{
union a
{
long int i, j;
int ch[2];
};
union a u;
u.ch[0] = 3;
u.i=1;u.j = 2;
u.ch[1] = 5 ;
printf( "%d, %d, %d, %d\n", u.ch[0], u.ch[1], u.j, u.i );
return 0;
}
int main()
{
union a
{
long int i, j;
int ch[2];
};
union a u;
u.ch[0] = 3;
u.i=1;u.j = 2;
u.ch[1] = 5 ;
printf( "%d, %d, %d, %d\n", u.ch[0], u.ch[1], u.j, u.i );
return 0;
}
Ravali said:
1 decade ago
I am not able to understand. And @Nandini you have a good explanation but I have understood it partially can you explain t more deeply?
Kuldip said:
1 decade ago
I read all question and answer but still I can't get answer of why union share common memory to all data elements.
Bhushan said:
1 decade ago
How we can calculate the value of u(I) at memory block 512?
Komal said:
1 decade ago
ch is char type of variable then how can we assign it number?
Ritika said:
1 decade ago
Please explain in detail why is it giving 515 as the size of the union?
Dhivya said:
1 decade ago
I confused that why we have to calculate the size of the union for i. Why it is not 0 like in structure?
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