C++ using Namespace continues Program

Program 11

#include 

#include

#include     

using namespace std;

int main() 

{

   string msg = "hello, world!";

   cout << msg << endl;

   cout << msg.length() << endl;  

   cout << msg.at(1) << endl;     

   cout << msg[1] << endl;        

   cout << msg.empty() << endl;   

   cout << msg.substr(3, 3) << endl;    cout << msg.replace(3, 3, "why") << endl; 

   cout << msg.append("end") << endl;        

   cout << msg + "end" << endl;              

   cout << msg.insert(3, "insert") << endl;  

   string msg1;

   msg1 = msg;   

   cout << msg1 << endl;

   cout << "Enter a line: ";

   getline(cin, msg);   

   cout << msg << endl;

}

Program 12

#include 

#include

using namespace std;

int main() 

{

   int const size = 5;

   int a1[size];  

   for (int i = 0; i < size; ++i) 

   cout << a1[i] << " ";

   cout << endl;   

   int a2[size] = {21, 22, 23, 24, 25}; 

   for (int i = 0; i < size; ++i) 

   cout << a2[i] << " ";

   cout << endl;   

   int a3[] = {31, 32, 33, 34, 35};

   int a3Size = sizeof(a3)/sizeof(int);

   cout << "Size is " << a3Size << endl;   

   for (int i = 0; i < a3Size; ++i)

   cout << a3[i] << " ";

   cout << endl;  

   int a4[size] = {41, 42};  

   for (int i = 0; i < size; ++i) cout << a4[i] << " ";

   cout << endl;   

   int a5[size] = {0};  

   for (int i = 0; i < size; ++i) cout << a5[i] << " ";

   cout << endl;   

   int a6[size] = {};   

   for (int i = 0; i < size; ++i) cout << a6[i] << " ";

   cout << endl;   

}

Program 13

#include 

#include

using namespace std;

void bubblesort(int a[], int size);

void print(const int a[], int size);

int main()

 {

   const int size = 8;

   int a[] = {8, 4, 5, 3, 2, 9, 4, 1};

   print(a, size);

   cout << endl;

   bubblesort(a, size);

   print(a, size);

   cout << endl;

}

void bubblesort(int a[], int size) 

{

   bool done = false; 

   int pass = 0;      

   int temp;          

   while (!done) 

    {

      cout << "Pass " << ++pass << " ..." << endl;   

      done = true;

      for (int i = 0; i < size - 1; ++i) 

       {

         if (a[i] > a[i+1]) 

           {

            print(a, size); 

            temp = a[i];

            a[i] = a[i+1];

            a[i+1] = temp;

            done = false;   

            cout << "=> ";  

            print(a, size);

            cout << endl;

         }

      }

   }

}

void print(const int a[], int size) 

 {

   cout << "{";

   for (int i = 0; i < size; ++i) 

   {

      cout << a[i];

      if (i < size - 1) cout << ",";

   }

   cout << "} ";

}

Program 14

#include 

#include

using namespace std;

void insertionSort(int a[], int size);

void print(const int a[], int iMin, int iMax); 

int main() 

{

   const int size = 8;

   int a[size] = {8, 4, 5, 3, 2, 9, 4, 1};

   print(a, 0, size - 1);

   cout << endl;

   insertionsort(a, size);

   print(a, 0, size - 1);

   cout << endl;

}

void insertionSort(int a[], int size) 

{

   int temp;   

   for (int i = 1; i < size; ++i) 

   {

      print(a, 0, i - 1);    

      print(a, i, size - 1);

      cout << endl;

      for (int prev = 0; prev < i; ++prev) 

      {

         if (a[i] < a[prev]) 

         {

            temp = a[i];

            for (int shift = i; shift > prev; --shift) 

            {

               a[shift] = a[shift-1];

            }

            a[prev] = temp;

            break;

         }

      }

   }

}

void print(const int a[], int imin, int imax) 

 {

   cout << "{";

   for (int i = imin; i <= imax; ++i) 

   {

      cout << a[i];

      if (i < imax) cout << ",";

   }

   cout << "} ";

}

Program 15

#include 

#include

using namespace std;

void selectionsort(int a[], int size);

void print(const int a[], int imin, int imax);

int main() 

{

   const int size = 8;

   int a[size] = {8, 4, 5, 3, 2, 9, 4, 1};

   print(a, 0, size - 1);

   cout << endl;

   selectionsort(a, size);

   print(a, 0, size - 1);

   cout << endl;

}

void selectionsort(int a[], int size) 

{

   int temp; 

   for (int i = 0; i < size - 1; ++i) 

   {

      print(a, 0, i - 1);

      print(a, i, size - 1);

      int minindex = i;  

      for (int j = i + 1; j < size; ++j) 

      {

         if (a[j] < a[minindex]) minindex = j;

      }

      if (minindex != i) 

        {  

         temp = a[i];

         a[i] = a[minindex];

         a[minindex] = temp;

      }

      cout << "=> ";

      print(a, 0, i - 1);

      print(a, i, size - 1);

      cout << endl;

   }

}

void print(const int a[], int imin, int imax) 

{

   cout << "{";

   for (int i = imin; i <= iMax; ++i) 

   {

      cout << a[i];

      if (i < imax) cout << ",";

   }

   cout << "} ";

}

Program 17

#include

#include

#include

using namespace std;

int getminutespace(double distance, int minutes, int seconds);

int getsecondspace(double distance, int minutes, int seconds);

int getminutespace(double distance, int minutes, int seconds)

{

double totalminutes = minutes + (seconds / 60.0);

double minutespermile = totalminutes / distance;

return (int) minutespermile;

decimal point

}

int getsecondspac

e(double distance, int minutes, int seconds)

{

double totalminutes = minutes + (seconds / 60.0);

double minutespermile = totalminutes / distance;

return (minutespermile -(int) minutesPerMile) * 60;

}

int main()

{

string firstname;

char c;

double distance;

int minutes, seconds;

do

{

cout << "What is your first name? " << endl;

cin >> firstname;

cout << "How many miles did you travel? ";

cin >> distance;

cout << "How many minutes and seconds did it take? ";

cin >> minutes >> seconds;

cout << firstname << ", your pace is " <<

getminutespace(distance, minutes, seconds) <<

" minutes and "

<< getsecondspace(distance, minutes, seconds)

<< " seconds

per mile." << endl;

cout << "Do again? " << endl;

cin >> c;

} while (c=='y');

return 0;

}