C Programming - Strings - Discussion
Discussion Forum : Strings - Find Output of Program (Q.No. 17)
17.
If the size of pointer is 32 bits What will be the output of the program ?
#include<stdio.h>
int main()
{
char a[] = "Visual C++";
char *b = "Visual C++";
printf("%d, %d\n", sizeof(a), sizeof(b));
printf("%d, %d", sizeof(*a), sizeof(*b));
return 0;
}
Discussion:
31 comments Page 1 of 4.
Vishwajeet Jadhav said:
11 months ago
I think the given answer is wrong.
The right answer should be 11, 8.
1,1
char a[] = "Visual C++"; initializes an array a with the string "Visual C++". The size of this array is the length of the string plus one for the null terminator, so sizeof(a) will be 11.
char *b = "Visual C++"; initializes a pointer b to point to the string "Visual C++". The size of a pointer on most systems is 8 bytes, so sizeof(b) will be 8.
sizeof(*a) gives the size of the first element of the array a, which is a char and is 1 byte.
sizeof(*b) gives the size of the first element pointed to by b, which is also a char and is 1 byte.
The right answer should be 11, 8.
1,1
char a[] = "Visual C++"; initializes an array a with the string "Visual C++". The size of this array is the length of the string plus one for the null terminator, so sizeof(a) will be 11.
char *b = "Visual C++"; initializes a pointer b to point to the string "Visual C++". The size of a pointer on most systems is 8 bytes, so sizeof(b) will be 8.
sizeof(*a) gives the size of the first element of the array a, which is a char and is 1 byte.
sizeof(*b) gives the size of the first element pointed to by b, which is also a char and is 1 byte.
(3)
Gouri Suders said:
1 week ago
Here, char *b is a pointer variable, so the number of bytes depends on the bitness of the system.
So if the system is 32, then the answer is 4.
If it is 64 bit system, then it is 8.
So, that's why here 4 bit, here they considered a 32-bit system.
So if the system is 32, then the answer is 4.
If it is 64 bit system, then it is 8.
So, that's why here 4 bit, here they considered a 32-bit system.
Yogesh said:
1 decade ago
char a[] has 10 characters + one escape character= 10+1=11 bytes
pointer *b have size 32 bits= 4 byte
*a points to first character of word(i.e. 'V')= 1 byte
*b points to first character of word(i.e 'V')= 1 byte
So answer prints:
11 4
1 1
pointer *b have size 32 bits= 4 byte
*a points to first character of word(i.e. 'V')= 1 byte
*b points to first character of word(i.e 'V')= 1 byte
So answer prints:
11 4
1 1
Pranay airan said:
2 decades ago
Char a[] has 10 letters and 1 escape character /0 so size of will give 11, size of pointer is 32 bit = 4 byte (1 byte = 8 bits), *a points to char V so sizeof(V) = 1 similarly *b also points to V.
Neeraj said:
1 decade ago
Since all types of pointers i.e. int pointer, char pointer, float pointer contains an address, so the size of each pointer is 2 bytes (for 16 bit compiler) and 4 bytes (for 32 bit compiler).
Sonu said:
1 decade ago
A is an array of character. And its length is 11 including ("\0") null character, so its size is 11 bytes.
*a and *b are pointer variables and point to char V that's size is 1 byte.
*a and *b are pointer variables and point to char V that's size is 1 byte.
Uttam raj said:
1 decade ago
@Pranay Airan:
But the size of int pointer is 4 bytes, size of char pointer is 2 bytes but here how it became 4 bytes i didn't understand could you please explain me.
But the size of int pointer is 4 bytes, size of char pointer is 2 bytes but here how it became 4 bytes i didn't understand could you please explain me.
Ankit verma said:
1 decade ago
I am sending answer to @Awanish.
If you initialized anything in string so it is not worry about ++. Because + sign is not a sign, it is a character at that time.
If you initialized anything in string so it is not worry about ++. Because + sign is not a sign, it is a character at that time.
Saurabh said:
7 years ago
@Rekha.
Your system must be 64 bit. Hence the size of the pointer is 64 bit. That's why it is showing 11, 8 instead of 11, 4.
Your system must be 64 bit. Hence the size of the pointer is 64 bit. That's why it is showing 11, 8 instead of 11, 4.
Smruti said:
1 decade ago
Any one can help how the 1st printf statement work. I want to say that size(a) means length of a or sizeof datatype of a?
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