Introduction to C++ Programming

8.1 Which of the following statements are correct?

A. char charArray[][] = {'a', 'b'};

B. char charArray[2][2] = {{'a', 'b'}, {'c', 'd'}};

C. char charArray[2][] = {{'a', 'b'}, {'c', 'd'}};

D. char charArray[][] = {{'a', 'b'}, {'c', 'd'}};

8.2 When you declare an array using the following statement inside a function, the element values are automatically initialized to 0.

int matrix[5][5];

A. True

B. False

8.4 What is the index variable for the element at the first row and first column in array a?

A. a[0][0]

B. a[1][1]

C. a[0][1]

D. a[1][0]

8.5 What is the output of the following code?

#include <iostream>
using namespace std;

int main()
{
   int matrix[4][4] =
     {{1, 2, 3, 4},
      {4, 5, 6, 7},
      {8, 9, 10, 11},
      {12, 13, 14, 15}};

   for (int i = 0; i < 4; i++)
     cout << matrix[i][1] << " ";

   return 0;
}

8.6 What is the output of the following code?

#include <iostream>
using namespace std;

int main()
{
   int matrix[4][4] =
     {{1, 2, 3, 4},
      {4, 5, 6, 7},
      {8, 9, 10, 11},
      {12, 13, 14, 15}};

   for (int i = 0; i < 4; i++)
     cout << matrix[1][i] << " ";

   return 0;
}

8.7 What is the prinout of the following program?

#include <iostream>
using namespace std;

int main()
{
   int values[2][4] = {{3, 4, 5, 1}, {33, 6, 1, 2}};

   int v = values[0][0];
   for (int row = 0; row < 2; row++)
     for (int column = 0; column < 4; column++)
       if (v < values[row][column])
         v = values[row][column];

   cout << v << endl;

   return 0;
}

8.8 Which of the following function declaration is correct?

A. int f(int[][] a, int rowSize, int columnSize);

B. int f(int a[][], int rowSize, int columnSize);

C. int f(int a[][3], int rowSize);

D. int f(int a[3][], int rowSize);

8.9 What is the prinout of the following program?

#include <iostream>
using namespace std;

int m(int list[], int numberOfElements)
{
   int v = list[0];
   for (int i = 1; i < numberOfElements; i++)
     if (v < list[i])
       v = list[i];
   return v;
}

int main()
{
   int values[2][4] = {{3, 4, 5, 1}, {33, 6, 1, 2}};

   for (int row = 0; row < 2; row++)
   {
     cout << m(values[row], 4) << " ";
   }

   return 0;
}

8.10 Which of the following statements are correct?

A. int data[2][2][];

B. int data[2][2][2];

C. int data[][][] = {{{1, 2}, {3, 4}}, {{5, 6}, {7, 8}}};

D. int data[][2][2] = {{{1, 2}, {3, 4}}, {{5, 6}, {7, 8}}};

E. int data[2][2][2] = {{{1, 2}, {3, 4}}, {{5, 6}, {7, 8}}};

8.11 What will be displayed by the following code?

#include <iostream>
using namespace std;

int main()
{
   int data[][2][2] = {{{1, 2}, {3, 4}}, {{5, 6}, {7, 8}}};

   cout << data[1][0][0] << endl;

   return 0;
}

8.12 What will be displayed by the following code?

#include <iostream>
using namespace std;

int ttt(int m[][2])
{
   int v = m[0][0];

   for (int i = 0; i < 2; i++)
     for (int j = 0; j < 2; j++)
       if (v < m[i][j])
         v = m[i][j];

   return v;
}

int main()
{
   int data[][2][2] = {{{1, 2}, {3, 4}},
      {{5, 6}, {7, 8}}};

   cout << ttt(data[0]) << endl;

   return 0;
}

8.13 What will be displayed by the following code?

#include <iostream>
using namespace std;

const int COLUMN_SIZE = 3;

double sum(const double m[][COLUMN_SIZE], int rowSize)
{
   int sum = 0;

   for (int i = 0; i < rowSize; i++)
     sum += m[i][i];

   return sum;
}

int main()
{
   double m[3][3] = {{1, 2, 3}, {1.5, 2.5, 3.5}, {0.1, 0.1, 0.1}};
   cout << "\nSum of all elements is " << sum(m,3) << endl;

   return 0;
}

Introduction to Programming with C++, Third Edition, Y. Daniel Liang

Many questions in this edition have been updated in the new edition. Please check with the publisher on the newest edition.

Chapter 8 Multidimensional Arrays