c++ 英语试题

kind 1 acquaintance 2 friend 3 good friend 4 very good friend 5 best friend
struct Friend {
string who; striபைடு நூலகம்g mail; int kind; };
b) Write the statement that would appear in a calling function to declare an Friend struct named DT for Donald Trump with email address don@. Unfortunately, Donald is only an acquaintance.
b) TRUE or FALSE: The array in the following declaration has 5 rows and 8 columns double fit[8][5];
Answer:________FALSE_____
c) Select the C++ statement listed below that creates random number rannum of type double between A and B (also type double):
Friend DT = {"Donald Trump", "don@", 1};
c) Given the following declaration list<Friend> friendList;
write the statement that will add the DT struct declared above to friendList.
for(int i = 1; i <= SIZE; i++) {
cout << "Enter a temperature: "; cin >> temperature; outFile << temperature << " " ; }
5. Suppose you have an array a[MAX][MAX] of integers. Here MAX is a global int constant. Write a function f that takes in the array and returns the number of interior locations in the array that contain a positive number which is surrounded above, below, left and right by negative numbers. For example, when applied to the array
_____ rannum = A + (A - B)*static_cast<double>( rand() )/RAND_MAX; _____ rannum = rand()%A + B; ___X__ rannum = A + (B - A)*static_cast<double>( rand() )/RAND_MAX;
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4. You need to write temperatures from an experiment to a data file. a) Write a statement or statements that creates an ofstream object named outFile and connects it to the external file EXP.DAT. ofstream outFile; outFile.open("EXP.DAT");
A. Derived class B. Virtual function C. Information hiding D. Inheritance E. Overloaded function F. Base class G. Static binding H. Operator overloading I. Dynamic binding J. Friend function K. Polymorphism __K__ The capability of having the same function name invoke different responses
12249 1 -2 -1 -1 0 -1 3 -2 8 0 0 -3 7 -1 0 -1 -1 -1 -1 -5
the function should return 2 since both the 3 and 7 entries meet the criterion, and no other elements do. a) Write the function declaration for this function.
b) Write a loop that prompts the user to enter input data, reads a temperature from the keyboard, and writes it to file EXP.DAT. Assume there are SIZE elements, where SIZE is an int. double temperature;
***** ANSWERS ***** Final Exam Sample Questions - Summer 2011
Note: these questions are based on material since the midterm The final exam will have questions from the earlier material as well. 1. Definitions Match the letter of the term with the following definitions.
int f(int mat[][MAX]);
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b) Write the function definition for this function.
int f(int mat[][MAX]) {
int num = 0;
for(int i = 1; i<MAX-1; i++) for(int j = 1; j<MAX-1; j++) { if( mat[i][j] > 0 && mat[i-1][j] < 0 && mat[i+1][j] < 0 && mat[i][j-1] < 0 && mat[i][j+1] < 0) num++; }
friendList.push_back( DT );
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d) Write the statement or statements that will create an iterator named fit and initialize it to point to the first element of friendList. list<Friend>::iterator fit; fit = friendList.begin();
push_back( value ) push_front( value ) insert( iterator, value ) begin() end() size()
a) Write the definition of a struct named Friend that you can use to keep track of your Facebook friends. The struct should have a member named who (data type string) for the friend's name, mail (string) for the friend's email address, and kind (int) to indicate the kind of friend using the following table:
programmer who wishes to use the class. __A__ A new class created from an existing class.
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2. List of Friend Structs
This problem uses the list<T> class. You can use one or more of the following member functions:
while(fit != friendList.end() ) {
if( (*fit).kind == 5 ) cout << (*fit).who << " " << (*fit).mail << endl;
fit++; }
3. Miscellaneous Topics a) TRUE or FALSE: An array name is a pointer to the beginning of the array in memory_______TRUE________
You are to create a simple version of a Pixel class. There will be three data members of type int named red, green, and blue to represent the color components. The member functions will initially be the default constructor, the constructor with parameters, and showPixel() to display the values of the data members. Function showPixel() will have a reference to an ostream object as its only parameter.