CSC 213 Final with Solution, Fall 2005

Notre Dame University CSC 213 — Final Faculty of Natural And Applied Sciences Name:_ 94 PART I - 10 SHORT QUESTIONS (20 Points: 2 points for each Question ) For the following ten questions circle the letter “T” or the letter “F” to indicate whether or not each of the statements is true or false, respectively. ct ©: c7. T (4): CT @: 20 F: 10.1) F ~~ An exception that is not caught is ignored. Thus the program continues its execution normally. : catch(...) is used to catch any exception type. : throw with no arguments rethrows the same exception type. : The Seekg() and seekp() functions are used to reposition the “file position pointer”. : The insertion operator <<” can be used with both sequential and random-access files. : Data can be modified in a random access file without destroying other data in the file. A stack is first-in, first-out data structure A derived class pointer can point to an object of the base class without the need for casting. Derived class can provide their own implementation of a base class virtual function. But if they do not, the base class implementation is used. : Any destructor in a class hierarchy can be declared virtual. 1/12 PART II - 7 PROBLEMS (35 Points) A) What is the output of the following program when it is executed? (5 Points) #include <iostream.h> void main() { try { for(int val=0; val<6; val++) { cout << "Value is: " «<< val << endl; if ( val >1 ) throw(val) ; } } catch(int v) { cout << "Value caught is: catch(...) { cout << "Value 0, 1, 2 are caught\n"; } "<< v << endl; } void catch_Zero(int v) { cout << "One is caught\n"; ~ } Value ts: © void catch_Two(int v) { cout << "Two is caught\n"; \ : } ght\ Value we 4 | Value wl a ' Vo hae Comalat nm a | 2. What is the output of the following program when it is executed? (5 Points) #include <iostream.h> void bar(int j) { if (j < 0) throw(j); cout << "Result is: " << 100 / j << endl; } void foo(int i) { bar (i); cout << "Value is:" << i << endl; } 001/2- 12 void main() { foo(10); wy VO try { Rawk ow foo(-1); " } Vatae wy ne catch(char * s) { cout << "Devide by zero\n"; } No ton do catch(int v) { cout << "No can do!\n"; } } 3. What is the output of the following program when it is executed? (5 Points) #include <iostream.h> #include <fstream.h> struct finals { int vOne; double vTwo; }; void main() { finals fs; ofstream ofObj("final.dat", ios::binary) ; for (int i=1; i <=10; i++) { fs.vOne = i; fs.vTwo = i + 0.5; ofObj . write (reinterpret_cast<const char*>(&fs),sizeof (finals) ); } ofObj.close(); ifstream ifObj("final.dat", ios::ate|ios::binary) ; ifObj .seekg (sizeof (finalS) ,ios: :beg) ; ifObj .read (reinterpret_cast<char *>( &fs), sizeof (finals) ); cout << fs.vOne <<endl << fs.vTwo << endl; ifObj . read (reinterpret_cast<char *>( &fs),sizeof(finalS) ); cout << fs.vOne <<endl << fs.vTwo << endl; } a3 wo ‘ 001/3-12 a 4. Given a data file 'TEST.DAT" with 6 records of different integer values What is printed following the execution if this program? (5 Points) #include <iostream.h> #include <fstream.h> class myFile { public: myFile(char * nm) { ifo.open(nm,ios::in); void mk() { bm = ifo.tellg();} void ps(long mk) { ifo.seekg(mk, ios: :beg) ; } void go() { ps(bm) ;} int gt() { int i; ifo >> i; return i; } private: ifstream ifo; long bm; C1 - 4% -\0 }; void main() { myFile mf("test.dat"); cout << mf.gt() << "- "; $3 - 4% ~ cout << mf.gt() << " - "; cout << mf.gt() «<< "- "; H mf .mk() ; ' mf.ps (0); H cout << mf.gt() << "- "; \ ; mf.go(); . ~ cout << mf.gt() << endl; 5. What is the output of the following program when it is executed? (5 Points) #include <iostream.h> template <class T> gant oy class arrc { ewe public: ~ arrC(int sz) { © <4@) SzV = sz; arr = new T[sz]; void f1(T); void ot() const; private: int szvV; T inv; T *aryr; }; 001/4-12 template <class T> void arrC<T>::f1(T in) { inv = in; for (int i=0; i < szV; i++) arr[i] = i + inv; } template <class T> void arrC<T>::ot() const { for (int i=0; i < szV; i++) cout << arrfi] << " "; } void main() { arrC<double> dArr (5); Vk, ne) EN a iN EN ™ arrC<int> iArr(6); \o \ Voy WOON \s \\ \ darr.£1(0.7); ay) ia) ay .9) Qs. dArr.ot(); cout << endl; iArr.£1(90); iArr.ot(); 6. What is the output of the following program when it is executed? (5 Points) #include <iostream.h> class anml { private: int wt; double ht; public: anml (int w=0, double h=0.0) { wt = w >0 ? w: 0; ht = h > 0.0 ? h: 0.0; virtual void a2b() { cout << "Run or Fly from A to B\n"; virtual void sng() { cout << "I cannot\n"; } virtual void inf() { cout << wt << " " << ht «<< endl; } 001/5- 12 class dg : public anml { public: dg(int a, int w, double h) : anml(w,h) { ag = a; } void a2b() { cout << "I Run from A to B\n"; } void inf () { anml::inf(); cout << ag << endl; } private: int ag; }i class brd : public anml { public: brd(bool f, int w, double h) : anml(w,h) { fl = f£; } void a2b() { if (£1 > 0) cout << "I walk from A to B\n"; else cout << "I Fly from A to B\n"; void sng() { cout << "Skweek\n"; } private: int fl; }; void main() { brd tt(1, 5, 10.4); dg mx(7, 20, 20.3); anml *aP, &aR=mx; TZ eamanslt mx.sng(); 5 tt.a2b(); Lund Sram A bo & aP = &tt; - aP->inf(); 10.4 aP->a2b(); aP->sng(); ZL wele Deon At aR.inf(); aR.a2b(); Cc \ aR.sng(); Ki week, } do 20.3 7 LD tonasl 001/6- 12 7. What is the output of the following program when it is executed? (5 Points) #include <iostream.h> class dnc { public: dnc(int i=0) { st(i);} void st(int i) {val=i;} int gt() const {return val; } private: int val; }i class abc { public: abC(int nb=2) { ae sz = nb; “2% comP = new dnC [nb]; void prt (int x=10) const { if (x < sz) cout << comP[x] .gt() else cout << "Noting to print..."; << "4; } void fl(int i=10) { for (int j=sz; j >=0; j--) comP [j] .st(j+i); } private: int sz; dnc *comP; abc obj obj obj obj obj obj (6); i -prt(1); j .£1(100) ; | -prt (6); -prt (3); -prt (0); Na (26\ wf ot) toS bol bor }; - void main() { © NoPriea ye pent, _, los YOO 001/7 - 12 PART III - THREE PROBLEMS (10 +17 +18 Points) 1. Write a program to read an integer number from a keyboard, and then to search for it in a sequential data file called "value.dat" that contains records of one integer field. The program should also write to the screen the word ‘FOUND’ or the word ‘NOT-FOUND' depending on the results of the search. Note: Use the space bellow to write your answer. You may use the back of the page if necessary. x cnlule Zoltar. W> RH inlado < LX reo wy m onddde Laura. & ho 001/8- 12 2. Having a random data file named " salary.dat" that contains information about a company’s employees and their monthly salaries. The file records have the following structure: | Employee Id (an integer.), Employee first name (maximum of 20 characters.), Employee family name (maximum of 20 characters.), Employee monthly salary (a double). The company has decided to increase the monthly salary of all employees by a percentage of 5.3%. Write a C++ program that will adjust the monthly salary information in the “salary.dat” file to meet the company’s salary increase decision. Implement all the necessary error check to earn full grades. Note: Use the space bellow to write your answer. You may use the back of the page if necessary. nip aoe emploat ie. \odudi Liat ren WS 3 res aeoy # nclade < wh ®ns VS Gov lank f9); dvulle \ ‘. merle o. (o, Wr ts Soe) * yp fey 001/9- 12 ©: Rod (eintiepret_conk Cohn 2) (A bixk\) cy (CNY. 3. Given the following geometric categories, with these definitions: Car Truck Vehicle Sedan (a kind of sports car) Wagon (a kind of carriage for example to sell on it vegetables) Knowing that all object have names, maximum speed and number of passengers (the driver is included), moreover they have two member function print the name and move: a) Write the deepest possible inheritance hierarchy b) Write only the following member functions: * Constructors for each class * printName to print the name of the form * move to go forward ot backward or left or right in meters " Overloaded operator << to print the data members value of the object c) Declare static objects in main and call the appropriate functions d) Declare dynamic objects in main and call the appropriate functions to prove the inheritance as well as polymorphism. Note: Use the space bellow to write your answer. You may use the back of the page if necessary. 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