Q:

Increment in both side in C

What is the meaning of the following line in C. What is the order of execute it?
float *x,*y;
*x++=*y++

Can any one explain how this evaluated?   

A:

For the original code:
x++ = y++

This line will never be evaluated because it is not legal C and will not be compiled. The result of x++ is not an lvalue and is not permitted on the left side of an assignment.
For the updated code:
float x,y;
*x++ = *y++

This is not legal because * cannot be applied to a float.
I will add this code:
float *x, *y;
*x++ = *y++;

This code says:

Let a temporary, say float *xt, equal x.
Let a temporary, say float *yt, equal y.
Add one to x.
Add one to y.
Assign *xt = *yt.

The actual operations may be performed in various orders, provide xt takes its value before x is updated, yt takes its value before y is updated, and xt and yt are defined before they are used.

