C program for swapping of two numbers





Code for swapping in c

#include<stdio.h>
int main(){
    int a,b,temp;
   
    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);
    printf("Before swapping: a = %d, b=%d",a,b);

    temp = a;
    a = b;
    b = temp;
    printf("\nAfter swapping: a = %d, b=%d",a,b);

    return 0;
}

C program for swapping of two numbers using pointers

#include<stdio.h>

int main(){

    int a,b;
    int *ptra,*ptrb;
    int *temp;

    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);

    printf("Before swapping: a = %d, b=%d",a,b);

    ptra = &a;
    ptrb = &b;

     temp = ptra;
    *ptra = *ptrb;
    *ptrb = *temp;

    printf("\nAfter swapping: a = %d, b=%d",a,b);
    return 0;
}

Sample output:
Enter any two integers: 5 10
Before swapping: a = 5, b=10
After swapping: a = 10, b=10


Swapping program in c using function

#include<stdio.h>

void swap(int *,int *);
int main(){

    int a,b;
   
    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);

    printf("Before swapping: a = %d, b=%d",a,b);

    swap(&a,&b);

    printf("\nAfter swapping: a = %d, b=%d",a,b);
    return 0;
}

void swap(int *a,int *b){
    int *temp;
    temp = a;
    *a=*b;
    *b=*temp;
}

Sample output:
Enter any two integers: 3 6
Before swapping: a = 3, b=6
After swapping: a = 6, b=6





16 comments:

  1. the first program should have

    b=temp;

    ReplyDelete
  2. jyothi.vit2/2/12, 4:49 PM

    logic: swapping

    a=a+b;
    b=a-b;
    a=a-b;

    ReplyDelete
  3. in the program for swapping 2 nos. it should be *temp= *ptra

    ReplyDelete
  4. swapping without 3rd variable
    a=a+b-a;
    b=a+b-b;

    ReplyDelete
    Replies
    1. its wnt work... :|
      a=a^b;
      b=a^b;
      a=a^b;

      Delete
    2. This is single line logic:

      b = b + a - (a = b);

      Delete
  5. swapping using ptr is wrong..
    should be
    int temp;
    temp=*a;

    ReplyDelete
  6. This comment has been removed by the author.

    ReplyDelete
  7. swapping in oneline is needed?

    ReplyDelete
  8. Very Nice Article helps a lot ...
    You can also find 6 type of logic to swap two number here check one it will be helpful ...
    Swapping of two numbers

    ReplyDelete
  9. Very Nice Article helps a lot ...
    You can also find 6 type of logic to swap two number here check one it will be helpful ...
    Swapping of two numbers

    ReplyDelete
  10. This comment has been removed by the author.

    ReplyDelete
  11. also use this
    ==========
    a=a-(~b)-1
    b=a+(~b)+1
    a=a+(~b)+1
    =========
    here ~b=(-b-1)

    ReplyDelete
  12. need to keep * in temp assigning in swap function

    ReplyDelete