C++ in simple pro

Problem1

#include 

#include

void main () 

{

  int width, horizpos, vertpos, beginhoriz, endhoriz;

  char c;

  cout << "Enter a character: ";

  cin >> c;

  cout << "Enter an integer: ";

  cin >> width;

  if ((width % 2) == 0) width = width+1;

  horizpos = 0;

  beginhoriz = width / 2;

  endhoriz = beginhoriz;

  while (beginhoriz >= 0) 

  {

   while (horizpos < width) 

   {

      if (horizpos < beginhoriz) cout << " ";

      else if (horizpos <= endhoriz) cout << c;

      else cout << " ";

      horizpos = horizpos + 1;

    }

    cout << endl;

    horizpos = 0;

    beginhoriz = beginhoriz - 1;

    endhoriz = endhoriz + 1;

  }

  horizpos = 0;

  beginhoriz = 1;

  endhoriz = width - 2;

  while (beginhoriz <= width / 2)

 {

    while (horizpos < width) 

    {

      if (horizpos < beginhoriz) cout << " ";

      else if (horizpos <= endhoriz) cout << c;

      else cout << " ";

      horizpos = horizpos + 1;

    }

    cout << endl;

    horizpos = 0;

    beginhoriz = beginhoriz + 1;

    endhoriz = endhoriz - 1;

  }

}

Problem2

#include 

#include

#include 

typedef int bool;

const bool true = 1;

const bool false = 0;

int readint (bool&);

int sumsquares (int i);

void main () 

{

  int i;

  bool endofdata;

  i = readint(endofdata);

  while (!endofdata) 

  {

    cout << "Sum of squares from 1 to " << i << " = " <<

      sumsquares (i) << endl;

    i = readint(endofdata);

  }

}

int readint (bool& b)

 {

  int i;

  cout << "Enter an integer greater than 1 (negative number to exit): ";

  cin >> i;

  while (i == 0) 

  {

    cout << "Re-enter integer: ";

    cin >> i;

  }

  if (i < 1) b = true; else b = false;

  return(i);

}

int sumsquares (int i) 

{

  int count, result;

  count = 1;

  result = 0;

  while (count <= i) 

  {

    result = result + count * count;

    count = count + 1;

  }

  return(result);

}

Problem3

#include 

#include

#include 

typedef int bool;

const bool true = 1;

const bool false = 0;

const char space = ' ';

const char newline = '\n';

void main () 

{

  ifstream f;

  char c;

  int numgaps;

  f.open("test.words");

  numgaps = 0;

  f.get(c);

  while (f) 

   { 

    if (c == newline) 

    {

      numgaps = numgaps + 1;

      f.get(c);

    }

    else if (c == space) 

    {

      while (f && c == space) 

     {

   f.get(c);

      }

      numGaps = numgaps + 1;

    }

    else f.get(c);

  }

  cout << "There are " << numgaps << " words" << endl;

}

Problem4

#include 

#include

void main () 

{

  int num, count = 1;

  float sum = 0.0;

  cout << endl;

  while (count <= 3) 

  {

    cout << "Enter a number: ";

    cin >> num;

    sum = sum + num;

    count = count + 1;

  }

  cout << "Average is " << sum / count << endl;

}

void main () 

{

  int num, count = 1;

  float sum = 0.0;

  cout << endl;

  while (count <= 3) 

   {

    cout << "Enter a number: ";

    cin >> num;

    sum = sum + num;

    count = count + 1;

  }

  cout << "Average is " << sum / (count - 1) << endl;

}