Absolute C++ (4th Edition) part 49 doc

... EXERCISES 1. Parts a, b, and c go in the interface file; parts d through h go in the implementation file. (All the definitions of class operations of any sort go in the implementation file.) Part i ... s2); Namespaces 493 Self-Test Exercises This allows you to omit names that are in the namespace but that are not used. That in turn avoids potential name conflicts. Moreover, it nicely do...

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... such cases C++ performs an automatic type cast, converting the 5 to 5.0 and placing 5.0 in the variable d. You cannot store the 5 as the value of d without a type cast, but sometimes C++ does the ... output with 1.3 cout 01_CH01.fm Page 28 Wednesday, August 20, 2003 2:21 PM 26 C++ Basics Notice the expression 2*(n++). When C++ evaluates this expression, it uses the value that number...

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... allow you to use the standard C++ libraries. ■ LIBRARIES AND include DIRECTIVES C++ includes a number of standard libraries. In fact, it is almost impossible to write a C++ program without using ... but for now we only need include direc- tives for standard C++ libraries. A list of some standard C++ libraries is given in Appendix 4. C++ has a preprocessor that handles some simp...

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... see numeric intervals given as 2 < x < 3 In C++ this interval does not have the meaning you may expect. Explain and give the correct C++ Boolean expression that specifies that x lies between ... the two alternatives in an if-else statement to do nothing at all. In C++ this can be accomplished by omitting the else part. These sorts of statements Branching Mechanisms 57 Self-Test...

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... of a for statement may be any C++ expressions; therefore, they may involve more (or even fewer) than one variable, and the variables may be of any type. 1 The C++ standard does specify that ... ends the current iteration of the loop body. The break state- ment can be used with any of the C++ loop statements. We described the break statement when we discussed the switch statement. .....

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... no intuitive meaning, but C++ converts the int values to bool and then evaluates the && and ! operations. Thus, C++ will evaluate this mess. Recall that in C++, any nonzero integer converts ... to false, so C++ will evaluate (5 && 7) + (!6) as follows. In the expression (5 && 7), the 5 and 7 convert to true; true && true evaluates to true, which...

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... score[2] , score[3] , and score[4] . The part that does not change, in this case score , is the name of the array. The part that can change is the integer in the square brackets, ... a[3]. This implementation is diagrammed in Display 5.2. Many of the peculiarities of arrays in C++ can only be understood in terms of these details about memory. For example, in the next...

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... 232 Structures and Classes Display 6.2 A Structure with a Structure Member (part 1 of 2) 1 //Program to demonstrate the CDAccount structure type. 2 #include <iostream> 3 ... Glass INTRODUCTION Classes are perhaps the single most significant feature that separates the C++ language from the C language. A class is a type whose values are called objects . Objects ... number...

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... in C, not C++. 16. When you define a C++ class, should you make the member variables public or private? Should you make the member functions public or private? 17. When you define a C++ class, ... or private? 17. When you define a C++ class, what items are considered part of the interface? What items are considered part of the implementation? ■ A structure can be used to combin...

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... are parts of the interface. All the declarations for private member functions are parts of the implementation. All member function definitions (whether the function is public or private) are parts ... function testDate is private since it is only intended to be used by other member functions and so is part of the hidden implementation details. We have omitted the member function set fr...

Ngày tải lên: 04/07/2014, 05:21