Question

I have to a C++ program I need help with. Can you break it into the two steps provided below.

Suppose MAX_SIZE is a global constant int variable that has been declared and initialized to an appropriate positive value.

1. int maxValue(const array<int, MAX_SIZE>&, int); is the prototype for a function that returns the value of the largest element in the array parameter. The array may be only partially filled. The int parameter indicates how many items are actually in the array, consecutively located beginning at index 0. For example, suppose the array contains the following 7 elements, with the remainder of the array unused and occupied by zeros:

1

10

3

5

10

4

9

0

0

...

Under these circumstances, the maxValue() function should return the value 10.

Write the complete function definition, including function header, for the maxValue()function.

HINT: Assume the first element in the array is the largest. Then compare all other elements to largest, updating largest each time a bigger element is found.

2. void showNums(const array<int, MAX_SIZE>&, int); is the prototype for a function that displays all the elements in the array parameter, where the parameters of this function are the same as described in question 1. This function will display the elements of the array horizontally, each right-justified in a 6-character wide field, with at most 5 elements per line. Given the example array in question 1, the output would look like the following, where the yellow ruler line is only for reference and not part of the output:

123456123456123456123456123456 
     1    10     3     5    10
     4     9

Write the complete function definition, including function header, for the showNums()function.

Hint: Use cout << endl; whenever 5 elements have been displayed. Use % on the for-loop counter to determine when it's time to do this.

Answer 1

The solution to the above question is given below. With the screenshot of output attached.

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I kept the logic simple and i have tested all outputs.

If there is anything else do let me know in comments.

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============ CODE TO COPY ===============================

main.cpp

#include <iostream>
#include <iomanip>
using namespace std;

//  Global constant variable 
//  initialized to positive value 
#define MAX_SIZE 12

//  returns the value of the largest element in the  
//  array parameter. 
int maxValue(const int *array, int size); 

//   print array right justified six char wide
void showNums(const int *array, int size); 

int main() {
  
  int array[MAX_SIZE] = {1,5,4,7,8,9,6,4,11,21};

  cout << "Max value is : " << maxValue(array,10) << endl;
  cout << "Array is : "     << endl;
  showNums( array , 10 );
  cout << endl;
  return 0;
}

int maxValue(const int *array, int size){
  int max  = array[0];// assuming first element is largest
  for ( int i = 0 ; i < size ; i++)
    if ( array[i] > max )
      max = array[i];
  return max;
}

void showNums(const int *array, int size){
  for ( int i = 0 ; i < size ; i++)
  {
    cout << right << setw(6) << array[i];
    if ( ( (i+1) % 5 )  == 0  )
      cout << endl;
  }
}

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Output :