2. (5.12 in 8e) Answer each of the following questions: a) What does it mean to choose numbers "at random"? b) Why is the rand function useful for simulating games of chance? c) Why would you randomize a program by using srand? Under what circumstances is it desirable not to randomize? d) Why is it often necessary to scale and/or shift the values produced by rand? 3. Define an array of 100 ints, and write a loop (including the body) to initialize every element in the array to 0. You can name the array whatever you'd like. 4. In C, strings have a terminating character at the end of the array, while, for example, integer arrays do not. Why do you think this is?

2. (5.12 in 8e) Answer each of the following questions: a) What does it mean to choose numbers "at random"? b) Why is the rand function useful for simulating games of chance? c) Why would you randomize a program by using srand? Under what circumstances is it desirable not to randomize? d) Why is it often necessary to scale and/or shift the values produced by rand? 3. Define an array of 100 ints, and write a loop (including the body) to initialize every element in the array to 0. You can name the array whatever you'd like. 4. In C, strings have a terminating character at the end of the array, while, for example, integer arrays do not. Why do you think this is?

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter15: Recursion

Section: Chapter Questions

Problem 12PE

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3.use c code to Write a function that gets two same size arrays as parameters and determines if they are permutations of each other. Two arrays are permutations of each other if one can be obtained by shuffling the other. If the arrays are permutations, the function should return 1 otherwise it should return 0. A suggested prototype for that function could be:int isPermutation(int array1[], int array2[], int commonSize) Example: If the two arrays are: Array1: {1,2,4,0, 5} Array2: {0,5,3,2, 1) Function should return a 0. If the ‘3’ in Array2 is changed to ‘’, it should return 1 Hint: answer must use c code and show the output
- in this exercise, please do not include and use string class. The function is using only array notation and manipulation.- string functions such as strlen is not allowed.- it should not have multiple return statements in the same function- there should be no global variable.- the function should not traverse the arrays more than once (e.g. looping through the array once only) A C++ PROGRAM named "changeCase" that takes an array of characters terminating by NULL character (C-string) and a boolean flag of toUpper. If the toUpper flag is true, it will go through the array and convert all lowercase characters to uppercase. Otherwise, it will convert all uppercase to lowercase. For example, if the array is {'H', 'e', 'l', 'l', 'o', '\0'} and the flag is true, then the array will become{'H', 'E', 'L', 'L', 'O', '\0'}. And if the flag is false, the array will become{'h', 'e', 'l', 'l', 'o', '\0'}
#17a Simple Statistics (not in textbook) Generate a STL array or vector of 1000 floating point numbers in the range 0 to 1. Compute the mean, median, and standard deviation of these. You may use function objects and lambda expressions, and the STL algorithms for_each, accumulate, and sort. You may not use any of the built-in looping constructs while, do-while or for. Also you may not create and use any ordinary c++ functions. Hint: The following code can be used to populate your random array named arr auto arr_store = [](float& v) { v = rand()/float(RAND_MAX); }; for_each(arr.begin(),arr.end(),arr_store); Warning, You may need to know some details about lambda expressions that are not covered in the textbook. These will be covered in the weekly lecture and in a sample program in Sakai resources. Note: The theoretical value of the standard deviation for large N is sqrt(1.0/12) which about 0.289. You should be getting a value fairly close to this.
8. using c++, Write a function method that determines the mean of all the values in an array of integers. Your mean function should call a separate function that you write that determines the sum. Don’t use built-in sum or mean gadgets, but roll your own.
5. Using c++, Write a function that determines the index of the second to the last occurrence of a target b in an integer array a. Return -1 if b is not in a or there is only 1 occurrence of b in a.
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6. Write a function that accepts an array of integers and returns -1 if sorted in ascending order, 1 if sorted in descending order, and 0 if not sorted. To be as efficient as possible, your function should make only one pass through the array.
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8.19 (Removing a Particular Word From a Given Line of Text) Write a program that inputs a line of text and a given word. The program should use string library functions strcmp and strcpy to remove all occurrences of the given word from the input line of text. The program should also count the number of words in the given line of text before and after removing the given word using the strtok function. Solve it Without using pointers