baseersd
Profile Answers by baseersd

Jan 24th, 2008

Hi Ujvala,

I am little bit confused with the question,
Are you asking like
1)Calling the function with structure as a parameter, whether changes value of structure or not
2)Passing of structure can be done by value or reference?

Hope the following program helps in understanding.

#include<stdio.h>

typedef struct _address
{
int ID;
char name[20];
}address;

void copy_ByValue(address obj)
{
obj.ID = 200;
strcpy(obj.name,"copy_ByValue");
     printf("nnDetails of obj1 in Copy_ByValue::");
    printf("nID :: %d",obj.ID);
    printf("nName ::%s",obj.name);
}
void copy_ByReference(address* obj)
{
obj->ID = 300;
strcpy(obj->name,"copy_ByReference");
printf("nnDetails of obj1 in copy_ByReference::");
    printf("nID :: %d",obj->ID);
    printf("nName ::%s",obj->name);
}
int main()
{
    address obj1;

    obj1.ID = 100;
    strcpy(obj1.name,"C Structures");

    printf("nnDetails of obj1 ::");
    printf("nID :: %d",obj1.ID);
    printf("nName ::%s",obj1.name);

    copy_ByValue(obj1);
    printf("nnDetails of obj1 after Copy_ByValue::");
    printf("nID :: %d",obj1.ID);
    printf("nName ::%s",obj1.name);
    copy_ByReference(&obj1);
    printf("nnDetails of obj1::");
    printf("nID :: %d",obj1.ID);
    printf("nName ::%s",obj1.name);

getch();
}