C Interview Questions and Answers


What is the purpose of realloc( )?

The function realloc(ptr,n) uses two arguments.the first argument ptr is a pointer
to a block of memory for which the size is to be altered.The second argument n specifies
the new size.The size may be increased or decreased.If n is greater than the old
size and if sufficient space is not available subsequent to the old region, the
function realloc( ) may create a new region and all the old data are moved to the
new region.

Posted by:Richards