CS 240 Computer Programming 1 Arrays

Transcription

1 CS 240 Computer Programming 1 Arrays 1

2 2 #1 Choose the correct answer..

3 3 #1 1.Which of the following correctly declares an array? Answer A. int anarray[10]; B. int anarray; C. anarray{10}; D. array anarray[10];

4 4 #1 2. What is the index number of the last element of an array with 29 elements? A. 29 B. 28 Answer C. 0 D. Programmer-defined

5 5 #1 3. Which of the following is a twodimensional array? A. array anarray[20][20]; B. int anarray[20][20]; Answer C. int array[20, 20]; D. char array[20];

6 6 #1 4. Which of the following correctly accesses the seventh element stored in foo, an array with 100 elements? A. foo[6]; B. foo[7]; C. foo(7); D. foo; Answer

7 7 #1 5. Which of the following gives the memory address of the first element in array foo, an array with 100 elements? A. foo[0]; Answer B. foo; C. &foo; D. foo[1];

8 8 #1 6. If char catname[15];, which of the following is valid? A. catname[15] = 'milie'; B. catname = 'milie'; C. catname[] = 'milie'; Answer D. none are valid.

9 9 #2 * Declare intarray as an array of integer having maxsize elements. * Initialize ALL elements of intarray to 0 Answer int intarray[maxsize]; for(int i=0; i<maxsize; i++) intarray[i] = 0;

10 10 #3 Trace the following programs, and show the output:

11 #3 11 for(int i=0;i<(size-1);i++) { for(int j=i+1;j<size;j++) { if(queue[i]>queue[j]) { temp=queue[i]; queue[i]=queue[j]; queue[j]=temp; } } }

12 #3 12 Answer There is no output It just sorts the array in ascending order

13 #3 13 int array [] = {16, 2, 3, 4, 8}; int n, result=0; int main () { for ( n=0 ; n<5 ; n++ ) { result += array[n]; } cout << result << endl; return 0; }

14 #3 14 Answer Loop # n Array [n] result Press any key to continue

15 #3 15 #include<iostream> using namespace std; int WIDTH =5; int HEIGHT =3; int array [HEIGHT][WIDTH]; int n,m; int main () { for (n=0;n<height;n++) for (m=0;m<width;m++) { array[n][m]=(n+1)*(m+1); } for (n=0;n<height;n++) { for (m=0;m<width;m++) cout<<array[n][m] << ' '; cout<<endl; } return 0;}

16 #3 Answer Press any key to continue..

17 #3 17 void printarray (int arg[], int length) { for (int n=0; n<length; n++) cout << arg[n] << " "; cout << "\n"; } int main () { int firstarray[] = {5, 10, 15}; int secondarray[] = {2, 4, 6, 8, 10}; printarray (firstarray,3); printarray (secondarray,5); return 0; }

18 #3 Answer Press any key to continue...

19 #3 19 char question[] = "Please, enter your first name: "; char greeting[] = "Hello, "; char yourname [80]; cout << question; cin >> yourname; cout << greeting << yourname << "!" << endl;

20 #3 20 Answer Please, enter your first name: Hadeel Hello, Hadeel! Press any key to continue...

21 #4 21 Write a program that reads an array of n integers, then use a function findnumpos that takes two parameters the array and a number to be found, then returns the position of a number x in the array. Note: the maximum array size is 20 How many integers you want to enter: 7 Enter the numbers: Which number you want to find its position: is at position(index) 2

22 #4 22 Answer

23 #4 23 Answer

24 #5 24 Write a function that returns the number of occurrences of an integer x in an array of n integers. How many integers you want to enter: 8 Enter the numbers: Which number you want to find its occurrences: 8 8 occurs 3 times

25 25 #8 Answer

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27 #6 27 Write a program that reads a string then send to the function ispalindrome, the function returns true if the string is palindrome and false otherwise. NOTE: - a palindrome is a string that is spelled the same way forward and backward. for example, radar madam abba are palindromes, but car is not. - Your string should be declared as an array of char.

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30 #7 30 Write a program that reads an array of n integers, then send it to a function multi10, that multiply each number in the array with 10 if the number is less than 100. Print the array after modification.

31 31 #10 Answer

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33 #8 33 Write a program that asks the user to type 10 integers of an array and an integer value V. The program must search if the value V exists in the array and must remove the first occurrence of V, shifting each following element left and adding a zero at the end of the array. The program must then write the final array.

34 34 #11 Answer

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36 #9 36 Write a program which takes 2 arrays of 10 integers each, a and b. c is an array with 20 integers. The program should put into c the appending of b to a, the first 10 integers of c from array a, the latter 10 from b. Then the program should display c.

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38 #9 38

39 #10 39 Write a program that generates a multiplications table. All multiplications from 1 to 5 should be included. Initialize the array s element to 0 and have your program populate the array with the proper values. Hint: array_a[i][j]=(i+1)*(j+1).

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41 #10 41