Devoted Devoted - 3 years ago 131
C Question

How does "while(*s++ = *t++)" copy a string?

My question is, what does this code do (from

while (*s++ = *t++);

the website says that the code above copies a string but I don't understand why...

does it have to do with pointers?

Answer Source

It is equivalent to this:

while (*t) {
    *s = *t;
*s = *t;

When the char that t points to is '\0', the while loop will terminate. Until then, it will copy the char that t is pointing to to the char that s is pointing to, then increment s and t to point to the next char in their arrays.

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