计算机类笔试题

计算机类笔试题

　1. Which of the following statements describe the use of the keyword static?

　　(1)Within the body of a function: A static variable maintains its value between function revocations

　　(2)Within a module: A static variable is accessible by all functions within that module

　　(3)Within a module: A static function can only be called by other functions within that module

　　2. Embedded systems always require the user to manipulate bits in registers or variables. Given an integer variable a, write two code fragments. The first should set bit 5 of a. The second shnuld clear bit 5 of a. In both cases, the remaining bits should be unmodified.

　　3. What does the following function return?

　　char foo(void)

　　{

　　unsigned int a = 6;

　　iht b = -20;

　　char c;

　　(a+b > 6) ? (c=1): (c=0);

　　return c;

　　}