Question

code must be c++ thank you

This assignment is about array operations. You need to count a specific items in an array. Steps to follow are here: • Create an array with 1000 items and fill it with random numbers from the range of -100, 100 (including - 100 and 100). . In your program asks user to enter a number, K. • Search this number and print the frequency (how many) of this K is found in the array • Ask another number, and so one. The program keeps running until user enters a out-of-range (-100,100) number. An example run is given below. The array with 1000 random items is ready... Enter a number: -4 Frequency of -4: 54 Enter a number: 4 Frequency of 4: 15 Enter a number: 35 Frequency of 35: 8

Answer 1

Here's the c++ code with necessary comments.

# include <iostream>
using namespace std;

int main() {
    // if srand() is not set, rand() always generates the same number as rand seed is alwys the same.
    srand(time(0));
    int k, arr[1000], count = 0;
    
    for (int i = 0; i < 1000; i++) {
        // generate a random number and insert it into array
        // generate a number from 0 - 200 and then subtract 100 from it
        // so that the range is now (-100, 100)
        arr[i] = rand() % (201) - 100;
    }
    
    cout << "The array with 1000 random items is ready...\n\n";
    
    cout << "Enter a number: ";
    cin >> k;
    
    while (k <= 100 && k >= -100) {

        for (int i = 0; i < 1000; i++) {
            // check if arr[i] is k
            if (arr[i] == k) {
                count ++;
            }
        }
        
        cout << "\nFrequency of " << k << ": " << count;
        
        // to read the next k
        cout << "\n\nEnter a number: ";
        cin >> k;
    }
    
    return 0;
}

Find the output in the screenshot below.

Run Code Untitled Save C++ - Output: Finished Clear Console Finished in 0 ms The array with 1000 random items is ready... Enter a number: Frequency of -4: 3 Enter a number: Frequency of 4: 5 Enter a number: Frequency of 35: 6 Enter a number: 1 # include <iostream> 2 using namespace std; 3 4 int main() { 5 // if srand() is not set, rand() always generates the same number as rand seed is alwys the same. 6 srand(time()); 7 int k, arr[1000], count = 0; 8 9 for (int i = 0; i < 1000; i++) { 10 // generate a random number and insert it into array 11 // generate a number from 0 - 200 and then subtract 100 from it 12 // so that the range is now (-100, 100) 13 arr[i] = rand() % (201) - 100; 14 } 15 16 cout << "The array with 1000 random items is ready...\n\n"; 17 18 cout << "Enter a number: "; 19 cin >> k; 20 21 while (k <= 100 && k >= -100) { 22 23 for (int i = 0; i < 1000; i++) { 24 // check if arr[i] is k if (arr[i] == k) { 26 count ++; 27 } 28 } 29 cout << "\nFrequency of " « k«":"« count; 31 32 // to read the next k 33 cout << "\n\nEnter a number: "; 34 cin >> k; 35 36 37 return 0; 381 25 30 stdin -4 4 35 201 } Share - Live Add Snippet