Arrays question. please write a c++ program that will ask the user to enter a ce

Question

Arrays question.

please write a c++ program that will ask the user to enter a certain number of grades (for example) , and will then ask the user for the target grade.

the target grade is the grade whose indices of occurences we need.

it should have two functions :

1) A function designed to partially fill an array

A function to search for ALL occurrences of a given grade. please note that i need the indices of those reoccuring grades be stored to a results array which will then be printed out in main.

Explanation / Answer

// C++ code
#include <iostream>
using namespace std;

void fillArray(int grades[], int size)
{
   for (int i = 0; i < size; ++i)
   {
       cout << "Enter grade " << (i+1) << ": ";
       cin >> grades[i];
   }
}

int* search(int grades[], int size, int target)
{
   int count = 0;
   for (int i = 0; i < size; ++i)
   {
       if(grades[i] == target)
           count++;
   }

   int *indexArray = new int[count];
   int j = 0;
   for (int i = 0; i < size; ++i)
   {
       if(grades[i] == target)
       {
           indexArray[j] = i;
           j++;
       }
   }

   return indexArray;
}

int main()
{
   int size = 5;
   int grades[size];
   int target;

   fillArray(grades, size);

   cout << "Enter target: ";
   cin >> target;

   int *indexArray = search(grades,size,target);

   cout << "Index of target in scores: ";
   int l = sizeof(indexArray)/sizeof(indexArray[0]);
   for (int i = 0; i < l; ++i)
   {
       cout << indexArray[i] <<" ";
   }
   cout << endl;
   return 0;
}

/*
output:

Enter grade 1: 2
Enter grade 2: 2
Enter grade 3: 3
Enter grade 4: 4
Enter grade 5: 1
Enter target: 2
Index of target in scores: 0 1
*/

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