C Programming - Floating Point Issues - Discussion

Discussion Forum : Floating Point Issues - Find Output of Program (Q.No. 2)

Floating Point Issues

What will be the output of the program?

#include<stdio.h>
int main()
{
    float *p;
    printf("%d\n", sizeof(p));
    return 0;
}

2 in 16bit compiler, 4 in 32bit compiler

4 in 16bit compiler, 2 in 32bit compiler

4 in 16bit compiler, 4 in 32bit compiler

2 in 16bit compiler, 2 in 32bit compiler

Answer: Option

Explanation:

sizeof(x) returns the size of x in bytes.
float *p is a pointer to a float.

In 16 bit compiler, the pointer size is always 2 bytes.
In 32 bit compiler, the pointer size is always 4 bytes.

Discussion:

3 comments Page 1 of 1.

Sachin said: 1 decade ago

Is it size always 2 byte irrespective of data type?

Hemanth said: 1 decade ago

Yes irrespective of datatype the default size of any pointer is 2 in 16 bit compiler, 4 in 32 bit compiler and 8 in 64 bit compiler.

Saket baghel said: 1 decade ago

Because pointers hold the address which will be INTEGER always not float so its indeed sizeof(int).

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