How do I sort the float array ?

Question

3.00/5 (1 vote)

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//The following is a function that sorts a students data according to the score that got. So I first try to sort the temp array created but the output is just 0.000000 for each loop. //

Objective-C

void sortbyscore(int entry,char name[entry][19],char surname[entry][19],float score[entry])
{
float temp[entry],tempvar;
int i,j;
for(i=0;i<entry;i++)>
	{
	temp[i]=score[i];
	}
for(i=0;i<entry-1;i++)>
	{
	for(j=0;j=entry-i-1;j++)
		{
		if(temp[j]<temp[j+1])>
			{
			tempvar=temp[j];
			temp[j]=temp[j+1];
			temp[j+1]=tempvar;
			}
		}	
	}
for(i=0;i<entry;i++)>
	{
	printf("%f",&temp[i]);
	}
}

Posted 31-Mar-15 17:37pm

User 11534381

Updated 31-Mar-15 18:10pm

RajeeshMenoth

v2

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Comments

Mehdi Gholam 31-Mar-15 23:50pm

Use a debugger and find out why.

3 solutions

Solution 2

Your program is not suppose to end at all.
your nested for loop condition is invalid.

C++

j=entry-i-1
//it should be 
j<entry-i-1>

</entry-i-1>

i guess this can be copy paste error.

But getting 0.00000000 is printf function is not correct.
it should be

C++

for(i=0;i<entry;i++)>
	{
//	printf("%f",&temp[i]);
        printf("%f",temp[i]);
	}

Posted 31-Mar-15 20:16pm

Mohibur Rashid

Solution 3

Quote:
for(i=0;i<entry-1;i++)>
{
for(j=0;j=entry-i-1;j++)
{

change to

C

for(i = 0; i < entry-1; i++)
{
  for(j = i+1; j < entry; j++)
  {

Posted 31-Mar-15 21:33pm

CPallini

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OriginalGriff · Accepted Answer · 2015-03-31T20:15:00

Start by looking at the values in the score array, and the size of the entry value.
Add this code at the start of the function:

C++

printf("%d\n",&entry);
for(i=0;i<entry;i++)>
    {
    printf("%f\n",&score[i]);
    }

If that all looks good, use the debugger to follow your code through and look at what exactly happens in your loops.