@snehal jain :
*Aim*: return arrary set value by you else by default initialized value..
take three array
{
int num[],
unsigned int from[], to[], {from array will point to "to[] array" }
{"to[] array" will point to "index
for which retrival is done"}
int element_filled
}
concept is :
initally all 3 array contains garbage value .
initialize count as 0; // this will count num which are set in num[]
*1 case:*
now suppose u try 2 get any number at index i in array num[]
check from[i]<count result will be false because from is unsigned int array
and have always > 0 value as garbage
in this case return initialize value...
2 case:
when u set a value in array num[i] do this step
from[i]=count;
to[count]=i;
count++
*3.getting result for set value:*
when we try get a number from already set index in num[] check if *
from[i]<count and to[from[i]]=i*
if true return set value .. if false return initialized value....
explanation:
if value will be set already then from[i] should be less than current
count{which is true if value is actually set by you manually }
but problem occurs if garbage value can also do that ..to remove that use
condition "to[from[i]]=i;" in this case
go to "to[] array" at which from[i] is pointing to if this contain same
index i of num[] then return set value else return initialized value .
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