Which set of preprocessor directives is used to prevent multiple inclusions of header files?

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Which set of preprocessor directives is used
to prevent multiple inclusions of header files?
1 #ifndef, #define and #endif
2 #ifdefined and #enddefine
3 #define and #endif only
4 #$if and #endif
5 #if and #define

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2012-04-30, 5138👍, 0💬

Which set of preprocessor directives is used to prevent multiple inclusions of header files?
Which set of preprocessor directives is used to prevent multiple inclusions of header files? 1 #ifndef, #define and #endif 2 #ifdefined and #enddefine 3 #define and #endif only 4 #$if and #endif 5 #if and #define 2012-04-30, 5139👍, 0💬

Referring to the sample code above, which one of the numbered lines of code is legal C++?
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What will the above code output if strVec is ...
std::cout << count_if( strVec.begin(), strVec.end(), bind2nd(greater (), "Baz") ); What will the above code output if strVec is a std::vector<std::string >and contains the strings "Foo", "Bar," "Baz", and "Bee"? 1 Unknown, those functions are non-standard. 2 2 3 "Bee" 4 "Baz" 5 ... 2012-05-02, 3963👍, 0💬

Referring to the sample code above, what value does I contain?
char s[] = {'a','b','c',0,'d','e','f',0}; int I = sizeof(s); Referring to the sample code above, what value does I contain? 1 3 2 6 3 7 4 8 5 9 2012-05-02, 3350👍, 0💬

Referring to the sample code above, how do you declare a numbers object called "A" and assign its "I" member the value "2"?
class numbers { int I; public: void set(int v) {I = v;} int read() {return I;} } ; Referring to the sample code above, how do you declare a numbers object called "A" and assign its "I" member the value "2"? 1) A : numbers; A.set(2); 2) numbers set(2); numbers A; 3) numbers A; set(2); 4) A.set(2), B.... 2012-05-01, 3304👍, 0💬

Your manager has asked you to integrate an existing project
Scenario:- Your manager has asked you to integrate an existing project with an external timer. Her requirements include adding a global variable whose contents can be only read by the software but whose value will be continuously updated by the hardware clock. Referring to the above scenario, which ... 2012-04-26, 3076👍, 0💬

Giving the following class definitions, how many subobjects of class V in class X?
Giving the following class definitions, how many subobjects of class V in class X? class V { /* ... */ }; class B1 : virtual public V { /* ... */ }; class B2 : virtual public V { /* ... */ }; class B3 : public V { /* ... */ }; class X : public B1, public B2, public B3 { /* ... */}; 2012-04-27, 3013👍, 0💬

Assuming that all the necessary standard headers have been ....
class Parent { public: Parent () { Status () ; } virtual ~Parent () { Status () ; } virtual void Status () { cout << "Parent "; } } ; class Child : public Parent { public: Child () { Status () ; } virtual ~Child () { Status () ; } virtual void Status () { cout << "Child " ; } } ;... 2012-05-03, 2880👍, 0💬

Referring to the sample code above, on which one of the following lines does an initializer list occur?
1: class Foo { 2: int size; string name; double value; 3: 4: public: 5: Foo() : size(0), name("unknown"), value(0.0) { 6: } 7: Foo(int s) { 8: size = s; name = "unknown"; value = 0.0; 9: } 10: Foo(int s = 0, string n = "unknown", double v=0) { 11: size = s; name = n; value = v; 12: } 13: }; Referrin... 2012-04-26, 2541👍, 0💬

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