Week04-newLecture2

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Unformatted text preview: ment 0 of array y, or py contains the address of y[0]. py: y[0] y[1] y[2] y[3] y[4] y[5] y[6] y[7] y[8] y[9] y: The assignment x = *py; will assign the contents of y[0] into x. 16 Pointers and Arrays (cont’d) • Pointer arithmeCc operaCons: – Now, since py points to a parCcular element in array y (y[0]), then py+1 will point to the next element in the array. • py+i will point to i elements a_er py • py-i will point to i elements before py • Thus, if py points to y[0], then *(py+1) refers to the contents of y[1]. 17 Pointers and Arrays (cont’d) • Regardless of the type or size of the variables in array y, when we add i to a pointer (e.g. py +i), we point to the i ­th object beyond py. • Pointer notaCon and array notaCon: int i, *px, x = {4,5,9}; int i, *px, x = {4,5,9}; int sum = 0; int sum = 0; px = x; px = x; for(i=0; i < 3; i++) for(i=0; i < 3;...
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This document was uploaded on 03/10/2014 for the course ENGINEER 2sh4 at McMaster University.

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