bubble sort

[jimhakans]

hello there,
i have very little concept of bubble sort. This code here is not working can u explain Why?

#include<stdio.h>
main()
{
int array[4]={60,88,33,40};
int j,i;
for(i=0;i<4;i++)
{
for(j=i+1;j<4;j++)
if(array[i]>array[j])
swap(&array[i],&array[j]);
}
printf("%d",array[i]);
}

Can anyone explain me why memory locator(&) is used in swap(line10).
Thanks in advance.

[sicarie]

Where's your swap implemented? After I did some touch-ups (like making it int main() ), that's the only thing my compiler complained about.

[jimhakans]

Where's your swap implemented? After I did some touch-ups (like making it int main() ), that's the only thing my compiler complained about.

My compiler is saying undefined function "swap" in function main().
and i dont understand why there is locator in line 10.

[sicarie]

My compiler is saying undefined function "swap" in function main().
and i dont understand why there is locator in line 10.

That's why I asked where your implementation of swap() was. You don't have one. You need to create one (or include a library with a swap()) to get rid of that error.

The & symbol is the reference - it gets the address of the variable, not the value, so that you are modifying the variable directly.