conditional operator (? :)

• syntax: expr1 ? expr2 : expr3

• semantic: ? if (expr1) then (expr2) else (expr3)

e.g. x = (y > 1) ? 3 : -3; ?

if y > 1 then x = 3 else x = -3;

main()

{

int x = -O4;

x >> 2;

printf(“%s %d\n”,

(x>=0)?”zero fill”:”sign extent”,x); }

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