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For example, the following Question doesn't have a solution:

Write a function, equalsArray that when passed two int arrays of the same length that is greater than 0 will return true if every number in the first array is equal to the number at the same index in the second array. If the length of the arrays is less than 1 the function must return false. For example, comparing the two arrays, {1,2,3,4,5} and {1,2,3,4,5} would return true but the two arrays {3,7} and {3,6} would return false.

You should start by copying the function-1-1.cpp file and name it function-3-1.cpp. Then add the function equalsArray to the new file.

The main function for this problem must call your readNumbers function twice, then pass both new arrays to your equalsArray function, display the result as true or false and finally delete the array. The main function in the file main-3-1.cpp.

The signature for your new function is:

bool equalsArray(int *numbers1,int *numbers2,int length) ;

Answer 1

function-3-1.cpp contents:

#include<iostream>
using namespace std;
// This function reads values into arr
void readNumbers(int* arr,int length)
{
   for(int i=0;i<length;i++)
   {
       cout<<"Enter value to store at index "<<i<<":";
       cin>>arr[i];
   }
}

// This function checks if both arrays are similar or not
bool equalsArray(int *numbers1,int *numbers2,int length)
{
   // If array length is less than 1, return false
   if(length < 1)
   {
       return false;
   }
   // If the array length is greater than or equal to 1
   for(int i=0;i<length;i++)
   {
       /*If value at index i in the numbers1 array,
       *is not equal to value at index i in the numbers2 array,
       *then return false
       */
       if( *(numbers1+i) != *(numbers2+i) )
       {
           return false;
       }
   }
   // When this step is reached, it means that the arrays are similar, so true is returned
   return true;
}

main-3-1.cpp contents:

#include "function-3-1.cpp"
int main()
{
   int arr_size;
   // Reading the sizes of both arrays
   cout<<"Enter the size of both arrays:";  
   cin>>arr_size;
  
   // Creating the arrays
   int* arr1 = new int[arr_size];
   int* arr2 = new int[arr_size];

   cout<<"Reading values for first array"<<endl;
   // Reading the values into first array
   readNumbers(arr1,arr_size);
   cout<<"\nReading values for second array"<<endl;
   // Reading the values into second array
   readNumbers(arr2,arr_size);  

   // Storing the result of the function equalsArray in the variable result
   bool result = equalsArray(arr1,arr2,arr_size);

   // Printing the result
   cout<<"The result is ";
   if(result==true)
   {
       cout<<"true"<<endl;
   }
   else
   {
       cout<<"false"<<endl;
   }

   // Deleting the arrays
   delete [] arr1;
   delete [] arr2;

   return 0;
}

Sample Output:

[ ~/documents/cpp_equals ] [ kandy@Nadimintys-MacBook-Air ] [$]> g++ main-3-1.cpp -o main [kandy@Nadimintys-MacBook-Air] - [~/documents/cpp_equals ] [Tue Aug 27, 16:39] -[$]> ./main Enter the size of both arrays:5 Reading values for first array Enter value to store at index 0:1 [Tue Aug 27, 16:39] Enter value to store at index 1:2 Enter value to store at index 2:3 Enter value to store at index 3:4 Enter value to store at index 4:5 Reading values for second array Enter value to store at index 0:1 Enter value to store at index 1:2 Enter value to store at index 2:3 Enter value to store at index 3:4 Enter value to store at index 4:5 The result is true

/documents/cpp_equals i [ kandy@Nadimintys-MacBook-Air ] [$]> g++ main-3-1.cpp -o main [ kandy@Nadimintys-MacBook-Air] [$]> ./main Enter the size of both arrays:2 Reading values for first array Enter value to store at index 0:3 [Tue Aug 27, 16:40] /documents/cpp_equals [Tue Aug 27, 16:40 Enter value to store at index 1:7 Reading values for second array Enter value to store at index 0:3 Enter value to store at index 1:6 The result is false