DS | Practical-1 | Call by Value and Call by reference Program

 

GTU Data Structure Practical-1

Introduction to pointers. Call by Value and Call by reference.

CALL BY VALUE

1. #include<stdio.h>
2. void swap(int,int);
3. int main()
4. {
5. int a,b;
6. printf("\nEnter a Value of A=");
7. scanf("%d",&a);
8. printf("\nEnter a Value of B=");
9. scanf("%d",&b);
10. swap(a,b);
11. printf("\nOld Values:");
12. printf("A=%d B=%d \n",a,b);
13. }
14. void swap(int p,int q)
15. {
16. int tmp;
17. tmp=p;
18. p=q;
19. q=tmp;
20. printf("New Values After Swap:");
21. printf("A=%d B=%d",p,q);
22. }

CALL BY REFERENCE

1. #include<stdio.h>
2. void swap(int*,int*);
3. int main()
4. {
5. int a,b;
6. printf("\nEnter a Value of A=");
7. scanf("%d",&a);
8. printf("\nEnter a Value of B=");
9. scanf("%d",&b);
10. swap(&a,&b);
11. printf("\nOld Values:");
12. printf("A=%d B=%d \n",a,b);
13. }
14. void swap(int *p , int *q)
15. {
16. int tmp;
17. tmp=*p;
18. *p=*q;
19. *q=tmp;
20. printf("New Values After Swap:");
21. printf("A=%d B=%d",*p,*q);
22. }

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