INTERVIEW QUESTIONS COMPUTER HARDWARE EMBEDDED SYSTEMS DETAILS

Question: Can structures be passed to the functions by value?

Answer: Yes, we can do it.
consider the following code..

#include<stdio.h>
#include<conio.h>
struct emp
{
int no;
int empno;
};
typedef struct emp empdata;

main()
{

empdata edata;
void display( empdata );

clrscr();
edata.no = 1;
edata.empno = 2005;
display( edata );

return 0;
}

void display( empdata pst )
{
printf( "%d", pst.empno );
}


Submitted by Vijaya Kumar ([email protected])

_______________


Yes structures can be passed to functions by value. Though passing by value has two disadvatanges :

1) The chages by the calling function are not reflected
2) Its slower than the pass by refrence funcion call.

Submitted by Pooja Agrawal ([email protected])

Yes, we can do it.
consider the following code..

#include<stdio.h>
#include<conio.h>
struct emp
{
int no;
int empno;
};
typedef struct emp empdata;

main()
{

empdata edata;
void display( empdata );

clrscr();
edata.no = 1;
edata.empno = 2005;
display( edata );

return 0;
}

void display( empdata pst )
{
printf( "%d", pst.empno );
}


Submitted by Vijaya Kumar ([email protected])

_______________


Yes structures can be passed to functions by value. Though passing by value has two disadvatanges :

1) The chages by the calling function are not reflected
2) Its slower than the pass by refrence funcion call.

Submitted by Pooja Agrawal ([email protected]) Source: CoolInterview.com

The answer is, yes you can, but you shouldnt do it. This is bad programming practice.
Think this way, if your structure contains only 4 or 8 bytes, you might get away with it, but for larger structures, if you pass them by value, you are risking stack overflow. Some intelligent code checking softwares will throw you a warning if you pass structures by value.
Now the decision is yours!!
Cheers Source: CoolInterview.com

#include<stdio.h>
#include<conio.h>
struct empy
{
int epyno;
int batchno;
};
void dspy(empy);
main()
{

empdata edat;
clrscr();
edata.no = 1;
edata.empno = 2005;
display( edat );

return 0;
}

void dspy( empy emp )
{
printf( "%d", emp.epyno );
}

By Karthik.G (09894149841) Source: CoolInterview.com

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