Question

The program will prompt the user to enter a number between [10 .. 20] (inclusive). After verifying that the number is within the proper range, you will generate that many random numbers and place them into a dynamically allocated array. Your program will then display the contents of the array (with 4 numbers per line). Next, you will sort the values in descending order (from largest to smallest). Lastly, you will display the sorted numbers (again, with 4 per line).

For my code have the bugs, when i compile that.please help me to check that

#include<iostream>
#include<cstring>
#include<ctime>
#include<cstdlib>
using namespace std;

void introduction(){

cout << " Sorting Random Integers Programmed by Jingwei Geng" << endl;
cout << " This program generates random numbers in the range [10 .. 20]," << endl;
cout << "displays the original list, and sorts the list in" << endl;
cout << "in descending order. Lastly, the sorted list is displayed to the user."<< endl;

}

void get_num(int *num_ptr )

{

cout<< " How many numbers should be generated? [10..20]," <<endl;

cin>> *num_ptr;

do{

if((*num_ptr < 10) ||( *num_ptr > 20))
cout<< "Invalid input"<<endl;

}while(*num_ptr >= 10 && *num_ptr <= 20);

}

void fill_array(int array_size, int *array)
{

for(int i=0; i< array_size; i++)
{
*(array + i) =rand()%(900)+100;// the number range is from [100, 999]
}
}
/*
*
* */
void sort_list(int array_size,int *array)
{

for(int i=0; i<array_size; i++)
{

for(int k=i+1; k<array_size; k++){

if( *array[k]>array[i]){

exchange((array[i+1]),(array[i]));
}//if

}//for

}//for

}//void

void exchange(int *a,int *b)
{
int temp;

   temp = *a;
   *a = *b;
   *b = temp;

}

void display_list(int array_size, int *array)
{
for(int i=0; i< array_size,i++;){

cout<<" " <<array[i];

}
cout <<endl;

}

int main(){

introduction();

   int *num_ptr;
   int *array;
   get_num(num_ptr);

   array = new int[*num_ptr];
   fill_array(*num_ptr,array);

       srand(time(NULL));

       cout<< "The unsorted random numbers:" <<endl;
       display_list(*num_ptr, array);
       cout<< "The sorted list:" <<endl;
       display_list(*num_ptr, array);
       cout<< " Thanks for using my program!" <<endl;

   delete[] array;
      
  

}

Answer 1

#include<iostream>
#include<cstring>
#include<ctime>
#include<cstdlib>

using namespace std;

void introduction() {
    cout << " Sorting Random Integers Programmed by Jingwei Geng" << endl;
    cout << " This program generates random numbers in the range [10 .. 20]," << endl;
    cout << "displays the original list, and sorts the list in" << endl;
    cout << "in descending order. Lastly, the sorted list is displayed to the user." << endl;
}

void get_num(int *num_ptr) {
    cout << " How many numbers should be generated? [10..20]," << endl;
    cin >> *num_ptr;
    do {
        if ((*num_ptr < 10) || (*num_ptr > 20))
            cout << "Invalid input" << endl;
    } while (*num_ptr >= 10 && *num_ptr <= 20);
}

void fill_array(int array_size, int *array) {
    for (int i = 0; i < array_size; i++) {
        *(array + i) = rand() % (900) + 100;// the number range is from [100, 999]
    }
}

void exchange(int *a, int *b) {
    int temp = *a;
    *a = *b;
    *b = temp;
}

void sort_list(int array_size, int *array) {
    for (int i = 0; i < array_size; i++)
        for (int j = 0; j < array_size - 1; j++)
            if (array[j] < array[j + 1])
                exchange(array + j, array + j + 1);
}

void display_list(int array_size, int *array) {
    for (int i = 0; i < array_size; i++) {
        cout << " " << array[i];
    }
    cout << endl;
}

int main() {
    introduction();
    int num_ptr;
    int *array;
    get_num(&num_ptr);

    array = new int[num_ptr];
    fill_array(num_ptr, array);

    srand(time(NULL));

    cout << "The unsorted random numbers:" << endl;
    display_list(num_ptr, array);
    sort_list(num_ptr, array);
    cout << "The sorted list:" << endl;
    display_list(num_ptr, array);
    cout << " Thanks for using my program!" << endl;
    delete[] array;
}