Print Theater Seats in C++: numRows & numCols

[aberlan]

Given numRows and numCols, print a list of all seats in a theater. Rows are numbered, columns lettered, as in 1A or 3E. Print a space after each seat, including after the last. Ex: numRows = 2 and numCols = 3 prints:
1A 1B 1C 2A 2B 2C

This is what I have so far, but I can't figure out how to turn the second number into a letter.

for (numRows = 1; numRows <= 2; numRows = numRows +1) {
col = 'A';
for (numCols = 0; numCols <= 2; numCols = numCols +1)
{
printf("%d%d ", numRows, numCols);
}
}

 

[Evgeny.Makarov]

Hi, and welcome to the forum!

It's best to use the [CODE]...[/CODE] tags (# button on the toolbar) to type program text and either [TEXTDRAW]...[/TEXTDRAW] or [CODE]...[/CODE] for preformatted text, for example,
[TEXTDRAW]
1A 1B 1C
2A 2B 2C
[/TEXTDRAW]

First, I would declare new variables for row and column counters instead of modifying numRows and numCols. It is possible to reuse numRows and decrement it until it becomes zero, but it may be required later in the code. The column number can be declared as a [m]char[/m]. You can use a [m]char[/m] expression (for example, a constant like 'A') as a one-byte integer; in particular, you can add the column counter to it. However, for technical reasons when arithmetic is performed on [m]char[/m]s, the result becomes an [m]int[/m]. So to print the result as a [m]char[/m], you can type cast the result of an arithmetic operation back to [m]char[/m]. So this is how you can write your code.

  for (int r = 0; r < numRows; r++) {
    for (char c = 0; c < numCols; c++)
      cout << r << char('A' + c) << " ";
    cout << endl;
  }

 

[jasonsmith206]

Had something similar to Intro to C at my school. Took a while to figure out but one part of it was making the 1 row but second row went 2A 2A 2A to a second line. So basically anyone whos on C or knows C and on C++ currently i trimmed the fat on the code and the result is this. cheers

int currRow=0, currCol=1;
char currColLet;

while(currRow<numRows)
{
currRow++;
currCol=1;
currColLet='A';
while(currCol<=numCols)
{
printf("%d%c ", currRow, currColLet);
currColLet++;
currCol++;
}
}