void getBiggerThan(float &uVal, float min)
{
   bool valOk = false;
   cout << "Please enter a number bigger than " << min << endl;
   while (!valOk) {
      cin >> uVal;
      if (cin.fail()) {
         cin.clear();
         cin.ignore(80, '\n');
         cerr << "That was not a number, please try again" << endl;
      } else if (uVal <= min) {
         cerr << "The value needs to be bigger than " << min << ", please try again" << endl;
      } else {
         valOk = true;
      }
   }
}

The function works as intended
 (error checking and repeating
  until a valid value is given,
  then returning the value).

void getBiggerThan(float &uVal, float min)
{
   bool badVal = true;
   cout << "Please enter a number bigger than " << min << endl;
   do {
      cin >> uVal;
      if (cin.fail()) {
         cerr << "That was not a number, please try again" << endl;
      } else if (uVal <= min) {
         cerr << "The value needs to be bigger than " << min << ", please try again" << endl;
      } else {
         badVal = false;
      }
   } while (badVal);
}

The program goes into an infinite loop
if the user enters a non-number, but
otherwise functions normally.
[Explanation: because the cin.fail case
 is missing the cin.clear and cin.ignore]

void getBiggerThan(float &uVal, float min)
{
   bool isGood = false;
   int attempt;
   cout << "Please enter a number bigger than " << min << endl;
   cin >> uVal;
   for (attempt = 0; isGood != true; attempt++) {
      if (cin.fail()) {
         cin.clear();
         cin.ignore(80, '\n');
         cerr << "That was not a number, please try again" << endl;
      } else if (uVal <= min) {
         cerr << "The value needs to be bigger than " << min << ", please try again" << endl;
      } else {
         isGood = true;
      }
   }
}

The program goes into an infinite loop
on any incorrect user input.
[Explanation: because the cin appears before
 the loop rather than inside it]

void getBiggerThan(float uVal, float min)
{
   cout << "Please enter a number bigger than " << min << endl;
   do {
      cin >> uVal;
      if (cin.fail()) {
         cin.clear();
         cin.ignore(80, '\n');
         cerr << "That was not a number, please try again" << endl;
      } else if (uVal <= min) {
         cerr << "The value needs to be bigger than " << min << ", please try again" << endl;
      } else {
         break;
      }
   } while (true);
}

The input checking and repetition appear to
run correctly, but the final correct value is
never received by the calling function (e.g. main).
[Explanation: because uVal is not pass-by-reference]

void getBiggerThan(float &uVal, float min)
{
   bool badVal = true;
   cout << "Please enter a number bigger than " << min << endl;
   while (badVal); {
      cin >> uVal;
      if (cin.fail()) {
         cin.clear();
         cin.ignore(80,'\n');
         cerr << "That was not a number, please try again" << endl;
      } else if (uVal <= min) {
         cerr << "The value needs to be bigger than " << min << ", please try again" << endl;
      } else {
         badVal = false;
      }
   }
}

The program goes into an infinite loop
because of a misplaced semi-colon.
[Explanation:there should not be a semicolon in 'while (badval); {' ]

void f(int x, int y)
{
   int i = 1;
   while (i <= x) {
      cout << (i+y) << endl;
      i++;
      if ((i % 2) == 0) {
         y--;
      }
   }
}

void f(int y, int x)
{
   int j = 1;
   do {
      cout << (j + x) << endl;
      j++;
      if ((j % 2) == 0) {
         x--;
      }
   } while (j <= y);
}

void f(int i, int j)
{
   int y = j;
   for (int x = i; x > j; x--) {
       cout << (x + y) << endl;
       y--;
   }
}

void f(int x, int y)
{
   int j = x;
   for (int i = y; i >= 1; i = i - 1) {
       int sum = i + j;
       j--;
       cout << sum << endl;
   }
}

void f(int x, int y)
{
   for (int i = 0; i < y; i++) {
       cout << (x + y) << endl;
   }
}

void f(int x, int y)
{
   int i = 0;
   while (i < y) {
       int sum = x + y;
       cout << sum << endl;
       i++;
   }
}

void f(int x, int y)
{
   while (x > 0) {
      if (y > x) {
         cout << x << endl;
      }
      x = x - 2;
   }
}

void f(int x, int y)
{
   do {
      if (x < y) {
         cout << x << endl;
      }
      x = x - 2;
   } while (x > 1);
}

void f(int x, int y)
{
   int i = y;
   while (i <= x) {
      i = i + 2;
      y = y + 1;
      cout << (i + y - 1) << endl;
   }
}

void f(int x, int y)
{
   for (int j = y; x >= j; j = j + 2) {
       y++;
       cout << (y + j + 1) << endl;
   }
}

void f(int x, int y)
{
   for (int r = 0; r < x; r++) {
       for (int c = 0; c < y; c++) {
           cout << "x";
       }
       cout << endl;
   }
}

xxxx
xxxx
xxxx

void f(int x, int y)
{
   int r = 0;
   while (r < y) {
      int c = 0;
      while (c < x) {
         cout << 'x';
         c++;
      }
      cout << endl;
      r++;
   }
}

xxx
xxx
xxx
xxx

void f(int x, int y)
{
   int r = 1;
   do {
      int c = 1;
      do {
         cout << "x";
         c++;
      } while (c <= y);
      r++;
   } while (r <= x);
   cout << endl;
}

xxxxxxxxxxxx

void f(int x, int y)
{
   int r = 1;
   while (r < x) {
      int c = 1;
      do {
         cout << "x";
         c++;
      } while (c < y);
      cout << endl;
      r++;
   }
}

xxx
xxx

void f(int x, int y)
{
   int r = 0;
   do {
      for (int c = 0; c <= y; c++) {
          cout << 'x';
      }
      cout << endl;
      r++;
   } while (r <= x);
}

xxxxx
xxxxx
xxxxx
xxxxx