C Programming - Strings - Discussion

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"When ambition ends, happiness begins."

- (Proverb)

16.

If char=1, int=4, and float=4 bytes size, What will be the output of the program ?

#include<stdio.h>

int main()
{
    char ch = 'A';
    printf("%d, %d, %d", sizeof(ch), sizeof('A'), sizeof(3.14f));
    return 0;
}

[A].	1, 2, 4	[B].	1, 4, 4
[C].	2, 2, 4	[D].	2, 4, 8

Answer: Option A

Explanation:

Step 1: char ch = 'A'; The variable ch is declared as an character type and initialized with value 'A'.

Step 2:

printf("%d, %d, %d", sizeof(ch), sizeof('A'), sizeof(3.14));

The sizeof function returns the size of the given expression.

sizeof(ch) becomes sizeof(char). The size of char is 1 byte.

sizeof('A') becomes sizeof(65). The size of int is 4 bytes (as mentioned in the question).

sizeof(3.14f). The size of float is 4 bytes.

Hence the output of the program is 1, 4, 4

Praveen said: (Mon, Sep 13, 2010 05:06:22 PM)

Additional Info: If 3.14f mentioned like 3.14 then it will be assumed as double. So answer will be 8.

Mantosh Tiwari said: (Fri, Nov 12, 2010 04:49:12 AM)

There are given that the int is of size 4 bytes so it will print 1 4 4 ..

Hitesh Bhateja said: (Wed, Jan 19, 2011 05:19:52 PM)

@SRIVIBHA, I agree with you.. sizeof('A') returns 1 byte because A is character not integer so it always returns character value.

Sattibabu said: (Fri, Nov 11, 2011 06:34:27 PM)

sizeof(A)=size of(65)=sizeof(int)=2bytes

Neeraj said: (Wed, Mar 7, 2012 05:58:16 PM)

sizeof('A')=it will always return 1 since there can be only 1 character in single quotes '' and the size of char is 1 bytes. sizeof("A")=it will return 2 bytes there are 2 characters in it (A and \0)as the compiler inserts the null character automatically.

Bala said: (Sun, Jul 8, 2012 05:47:47 PM)

@Neeraj: How come sizeof('as') return 2 bytes? In single quote can ther be two characters?

Yogesh said: (Tue, Oct 2, 2012 11:53:33 PM)

In single quotation there can be only character. Correct. Ok then sizeof ('A') will be simply sizeof (char). So it will definitely return 1 byte. Obviously.