Interested to Buy Any Domain ? << Click Here >> for more details...
write a program for size of a data type without using
sizeof() operator?
- 22 Answers
- 51403 Views
- HCL, IBM, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / govind279
#include<stdio.h>
int main()
{
int n;
int x,*p,*p1;/* here u can change the type */
p=&x;
p1=(p+1);
printf("size of x is : %d\n",n=(char *)(p1)-(char *)p);
}
Note:without type cast, it always gives 1.
i.e 1 int(4 chars), 1 float(4 chars),1 double(8
chars)etc...coz p+1 points to the next new location of same
type.
| Is This Answer Correct ? | 40 Yes | 9 No |
Answer / g
This code will work in TC with 2 warnings but can get result
void main()
{
char *Ptr1,*Ptr2;
float fl;
ptr1 = &fl;
ptr2 = (&fl+1);
printf("%u",ptr2-ptr1);
}
This is a way to get the size of data type...waiting for
any other way...
| Is This Answer Correct ? | 44 Yes | 26 No |
Answer / sunil
This has been solved in parts. I am not sure if there are
any better method merging it.
case 1. User passes a variable as the parameter.
eg: int n;
sizeof(n);
case 2. User passes a data type as the parameter.
eg: sizeof(int)
Solution
case 1: #define GetSize(x) (char*)(&x + 1) - (char*)&x
case 2:#define GetMySize(x) (char*)((x*)10 + 1) - (char*)10
| Is This Answer Correct ? | 15 Yes | 6 No |
Answer / abdur rab
#include <stdio.h>
struct node {
int x;
int y;
};
unsigned int find_size ( void* p1, void* p2 )
{
return ( p2 - p1 );
}
int main ( int argc, char* argv [] )
{
struct node data_node;
int x = 0;
printf ( "\n The size :%d",
find_size ( (void*) &data_node,
(void*) ( &data_node +
1 ) ) );
printf ( "\n The size :%d", find_size ( (void*) &x,
(void*) ( &x + 1 ) ) );
}
this will work for any data type
| Is This Answer Correct ? | 15 Yes | 8 No |
Answer / arun kumar mishra kiit univers
#include<stdio.h>
#include<conio.h>
void main()
{
float f1,*Ptr1,*Ptr2;
ptr1 = &fl;
ptr2 = (&fl+1);
printf("%u",(char *)ptr2-(char *)ptr1);
getch();
}
| Is This Answer Correct ? | 11 Yes | 4 No |
Answer / mukesh kumar singh
#include <iostream>
using namespace std;
struct node {
int x;
int y;
char *s;
};
int main()
{
node x,*p;/* here u can change the type */
p=&x;
cout<<"\n\nSize of node Is : "<<(char*)(p+1)-(char*)p;
return 0;
}
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / lalit kumar
#include "stdafx.h"
#include "stdio.h"
#include "conio.h"
int main()
{
char *a,*s, v='m';
a=&v;
s=a;
a++;
int intsize=(int)a-(int)s;
printf("%d",intsize);
getch();
return 0;
}
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / subham singh
1 #include<iostream>
2 using namespace std;
3 main()
4 {
5 int i;
6 int* p = &i;
7 int* q= p;
8 p++;
9 cout<<(char*)p-(char*)q<<endl;
10 }
11
~
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / anil arya
http://stackoverflow.com/questions/1219199/size-of-a-datatype-without-using-sizeof
| Is This Answer Correct ? | 2 Yes | 1 No |
write the function int countchtr(char string[],int ch);which returns the number of timesthe character ch appears in the string. for example the call countchtr("she lives in Newyork",'e') would return 3.
what is c?
the data type used for unlimited value in c and how to do this program
what is the maximum limit of row and column of a matrix in c programming. in linux .
What would be an example of a structure analogous to structure c?
Explain do array subscripts always start with zero?
How can you invoke another program from within a C program?
what is the definition of storage classes?
How do you define a function?
How is = symbol different from == symbol in c programming?
What is a #include preprocessor?
How many main () function we can have in a project?
C 
