## INDEX

### Write a c program for swapping of two arrays

Write a c program for swapping of two arrays

#include<stdio.h>
int main(){
int a[10],b[10],c[10],i;
printf("Enter First array->");
for(i=0;i<10;i++)
scanf("%d",&a[i]);
printf("\nEnter Second array->");
for(i=0;i<10;i++)
scanf("%d",&b[i]);
printf("Arrays before swapping");
printf("\nFirst array->");
for(i=0;i<10;i++){
printf("%d",a[i]);
}
printf("\nSecond array->");
for(i=0;i<10;i++){
printf("%d",b[i]);
}
for(i=0;i<10;i++){
//write any swapping technique
c[i]=a[i];
a[i]=b[i];
b[i]=c[i];
}
printf("\nArrays after swapping");
printf("\nFirst array->");
for(i=0;i<10;i++){
printf("%d",a[i]);
}
printf("\nSecond array->");
for(i=0;i<10;i++){
printf("%d",b[i]);
}
return 0;
}

1. What to do if both arrays are of unequal length?

1. just ur r swapping the elements of two arrays so, I think no need of equal length to swap each other

2. before dat in program they're reading 10 values for each array

3. if arrays are of un equal size then you just no need to mention its size

like:
int a[10]
int b[10]
int a[size]
int b[size]

2. Same program by using pointers.

#include
void swap(int *, int *);
main()
{
int a[10],b[10],i;
printf("Enter First array->");
for(i=0;i<10;i++)
scanf("%d",&a[i]);
printf("\nEnter Second array->");
for(i=0;i<10;i++)
scanf("%d",&b[i]);
for(i=0;i<10;i++)
swap(&a[i], &b[i]);

printf("\nArrays after swapping");
printf("\nFirst array->");
for(i=0;i<10;i++)
printf("%d ",a[i]);

printf("\nSecond array->");
for(i=0;i<10;i++)
printf("%d ",b[i]);
}
void swap(int *arr1, int *arr2)
{
int temp;
temp = *arr1;
*arr1 = *arr2;
*arr2 = temp;
}

1. can't we write the program with out using swap keyword using pointers

3. can u write a program by using array......such as
scanf 8 number then printf b[1]=1 b[2]=2 b[3]=3...b[8]=8 then convert it b[1]=8 b[2]=7....b[8]=1 ....please write this program...my fb id /mi.tanim.1

4. why dont you dynamically allocate array and change the address

5. #include
#include
#include
int b[10],a[10],n,g,i,u;
void dd(int);
void main()
{
clrscr();
printf("enter ");
scanf("%d",&n);
if(n==0)
{
goto g;
}
for(i=0;ig)
{
for(i=g;i<n;i++)
b[i]=a[i];
}
for(i=0;i<g;i++)
printf("\n%d",a[i]);
for(i=0;i<n;i++)
printf("\n%d",b[i]);
g:
getch();
}
void dd(int u)
{
if(a[i]!=0)
{
b[i]=a[i];
a[i]=u;
}
else
a[i]=b[i];
}