Chapter 16 : Pointers and Arrays

Example: 1, Page No.:5.118

In [4]:
#Program to print the value and address of the element

a=[10,20,30,40,50]
for b in range(0,5):
    print "The value of a[%d]=%d"%(b,a[b])
    print "Address of a[%d]=%u"%(b,id(a[b]))

The value of a[0]=10
Address of a[0]=4299197952
The value of a[1]=20
Address of a[1]=4299197712
The value of a[2]=30
Address of a[2]=4299197472
The value of a[3]=40
Address of a[3]=4299199208
The value of a[4]=50
Address of a[4]=4299198968

Example: 2, Page No.: 5.119

In [58]:
#Program to print the value and the address of the element using pointer with function

a=[10,20,30,40,50]

for c in range(0,5):
    print "The Value of a[%d]=%d"%(c,a[c])
    print "The address of a[%d]=%u"%(c,id(b))
def value(b):
    b=''
    id(b)

The Value of a[0]=10
The address of a[0]=4296527248
The Value of a[1]=20
The address of a[1]=4296527248
The Value of a[2]=30
The address of a[2]=4296527248
The Value of a[3]=40
The address of a[3]=4296527248
The Value of a[4]=50
The address of a[4]=4296527248

Example:3, Page No,: 5.120

In [67]:
#Program to add the sum of number using pointer

a=[10,20,30,40,50]

b=total=0
c=id(c)

for b in range(0,5):
    print "Enter the number %d: "%(b+1)
    a[b]=input()
    
c=a
for b in range(0,5):
    total=total+c[b]
    c[b]=c[b]+1

print "Total= %d"%(total)

Enter the number 1: 
10
Enter the number 2: 
20
Enter the number 3: 
30
Enter the number 4: 
40
Enter the number 5: 
50
Total= 150

Example: 4, Page No.: 5.121

In [72]:
#Program to sort a given number using pointer.

arr = []
n = input("Enter the no. of elements: ")
for i in range(0,n):
    arr.append(0)
print "Enter the element: "    
for i in range(0,n):
    arr[i]=input()
print "Before Sorting:"    
for i in range(0,n):
    print "%d"%arr[i],
    
for i in range(0,n):
    for j in range(i,n):
        if arr[i]>arr[j]:
            t = arr[i]
            arr[i] = arr[j]
            arr[j] = t
print "\nAfter Sorting:"
for i in range(0,n):
    print "%d" %arr[i],

Enter the no. of elements: 5
Enter the element: 
8
5
7
4
6
Before Sorting:
8 5 7 4 6 
After Sorting:
4 5 6 7 8