意法半导体软件试题

    a test for the c programming language

    i. history

    1. c inally designed for and implemented on the ( system on the dec pdp-11, by (le line comments notation “//” is or isn’t a feature of c89.

    ii. syntax and semantics

    1. in a runtime c program, auto variables are stored in   , static variables are stored in   , and function parameters are stored in   .

    a. stack   b. heap   c. neither stack nor heap

    2. the statement “extern int x;” is a   , and the key   .

    a. variable declaration   b. variable definition

    c. compilation time d. runtime

    3. there is a complicated declaration: void (  signal (int, void ()(int)) ) (int);

    if a statement “typedef void (p) (int);” is given, please re code is a segment of c program.

    ..........

    void func(int p)

    {...........}

    ..........

    main()

    {

    int num=0;

    .........

    func(&num);

    ........

    }

    ..........

    here, the function argument “&num” is passed  .

    a. by value b. by reference

    iii. practice

    create a tree,  incomplete solution.

    #include

    #include

    struct tree{

    char info;

    p_sub; //link to sub-nodes

    };

    // allocate memory and initiate

    void dnode ( struct tree tmp )

    {

    =malloc( sizeof (struct tree) );

    = 0x41;

    = null;

    }

    struct tree dtree (struct tree subtree, int height, int ht == 1 )

    return subtree;

    else if ( height == 2 ) {

    struct tree leaf = null;

    for ( i=0; i</p>

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