I'm trying to sort the following list (which gets inserted to the a array): 10 9 8 7 6 5 4 3 2 1 After the below java code executes I get the following (not sure why the largest number is still unsorted, thanks in advance for any help you can provide): 10 1 2 3 4 5 6 7 8 9
I'm basically implementing the java code from the following pseudocode from a text book:
procedure insertionsort(a1, a2, ...an: real numbers with n>=2)
for j:=2 to n
begin
i:=1
while a[j]>a[i]
i=:i+1
temp:=a[j]
for k:=0 to j - i - 1
a[j-k] := a[j-k-1]
a[i]:=temp
end
java code:
int k, j,i;
long temp;
for(j=2; j<nElems; j++)
{
i=1;
//also tried while(a[j]>=a[i])
while(a[j]>a[i])
i = i +1;
temp = a[j];
for(k=0; k<=(j-i-1);k++)
a[j-k] = a[j-k-1];
a[i] = temp;
}// end for
The problem is that the pseudocode array is 1-based, while Java arrays are 0-based.
Just change
for (j=2; j<nElems; j++) {
i=1;
// more code
to
for (j=1; j<nElems; j++) {
i=0;
// more code