cin, cout rows and columns

[oi123]

I don't know how do get the rows can you help me please :(

#include<iostream>
#include<string>
 
using namespace std;
 
int rows;
int cols;
string sym;
int count;
 
cout << "Please enter a symbol to be display: ";
cin >> sym;
 
do
{
cout << "\tPlease enter how many colunms to create: ";
cin >> cols;
cout << "\n\n\n";
}
 
while(cols < 10);
 
for (count = 1; count <= cols; count++)
 
cout << "\n\t\t" << sym;
 
cin.ignore();
return 0;
}

[Savage]

By using nested loops,do u know what nested loops are?

Savage

[oi123]

By using nested loops,do u know what nested loops are?

Savage

nested loop is a loop that inside another loop?, :( I'm so behind on this I can't figure out how to do this anymore and the program is due this Monday, my friend told me to do it as

for (int x=0; x<rows; x++)
{
  for (int y=0; y<cols; y++)
  {
    cout >> "enter character: ";
    cin << sym;
 
  }
}

but I just don't understand why he prompt user to input character after rows and column and how would it generate in to a map? I'm very confuse and so afraid to ask him again because he might get mad this time after so many question already ask lol.

[Savage]

for (int x=0; x<rows; x++)
{
  for (int y=0; y<cols; y++)
  {
    cout >> "enter character: ";
    cin << sym;
 
  }
}

Tell me something:

Are u suppossed to print one character,or more of them?

and please use codetags when posting ur code ;)
Savage

[oi123]

I'm suppose to create a floor plan of a room that contain a floor tiles, wall and entry door and a escape hatch, a key and a piranha and have at less 10 rows and 10 columns by prompting user to enter any symbol they desire, I just don't know what method I should use :(

[Savage]

I'm suppose to create a floor plan of a room that contain a floor tiles, wall and entry door and a escape hatch, a key and a piranha and have at less 10 rows and 10 columns by prompting user to enter any symbol they desire, I just don't know what method I should use :(

Do u know how it's supposed to look,were there a example in ur assigment?

Please be more specific and supply more information

Savage

[oi123]

Do u know how it's supposed to look,were there a example in ur assigment?

Please be more specific and supply more information

Savage

example

please enter a character for wall
cin >> w
please enter how many rows:
cin >> 10;
please enter how many columns:
cin >> 10;



so it create a map with 10 rows and columns

wwwwwwwwww
w w
w w
w w
w w
w w
w w
w w
w w
wwwwwwwwww

[Savage]

example

please enter a character for wall
cin >> w
please enter how many rows:
cin >> 10;
please enter how many columns:
cin >> 10;



so it create a map with 10 rows and columns

wwwwwwwwww
w w
w w
w w
w w
w w
w w
w w
w w
wwwwwwwwww

Ok here are some hints:

1.ask user to input a character.
2.create nested loops,so that counter from first loop tells u in which row u are and secound one is printing characters in row.
3.in nested loop check the counter from the first loop,if that value equals to 1 or to number of rows,print just symbol if not check the counter from the inner loop,if it has a value of 1 or of characters per row,print symbol else print whitespace.
4.close parenthisis for the inner loop,and add endl,or '\n' to move on to next row.

Savage

[oi123]

#include <iostream>
#include<string>
using namespace std;
 
int main()
{
    //string sym;
    int x, y;
    int rows;
    int cols;
    do
    {
    cout << "Please enter how many rows: ";
    cin >> rows;
    } while(rows <10);
 
    do
    {
        cout << "Please enter how many column: ";
        cin >> cols;
    } while (cols <10);
for(int y =1; y <= rows; y++)
 
    cout << y << endl;
for(int x =1; x <= cols; x++)
    cout << x;
 
cin.ignore(); cin.ignore();
  return 0;
}
 

okay this is all I have, now how do I prompt user to input for chracter to create row and column and an entrance also exit door. sorry I can't figure it out anymore :(

[oi123]

#include <iostream>
#include<string>
using namespace std;
 
 
int main()
{
 
    int rows;
    int cols;
    char wall;
    do
    {
    cout << "Please enter how many rows: ";
    cin >> rows;
    } while(rows <10);
     string map[rows];
    do
    {
        cout << "Please enter how many column: ";
        cin >> cols;
    } while (cols <10);
    cout << "Please enter a rows for wall: ";
    cin >> wall;
for(int i=1; i< rows; i++)
{   
do
{
 
    map[i] = string(getline()); 
} while (map[i].length!=cols);
 
for (int i = 0; i < rows; i++)
   for (int j = 0; j < cols; j++)
        if (map[i][j] == wall) map[i][j] = ' ';
 
 
}
// for(int x =1; x <= cols; x++)
   // cout << x;
 
cin.ignore(); cin.ignore();
  return 0;
}
 

this is what I have so far but is keep giving me an error because of map size any idea why?

[Savage]

#include <iostream>
#include<string>
using namespace std;
 
 
int main()
{
 
    int rows;
    int cols;
    char wall;
    do
    {
    cout << "Please enter how many rows: ";
    cin >> rows;
    } while(rows <10);
     string map[rows];
    do
    {
        cout << "Please enter how many column: ";
        cin >> cols;
    } while (cols <10);
    cout << "Please enter a rows for wall: ";
    cin >> wall;
for(int i=1; i< rows; i++)
{   
do
{
 
    map[i] = string(getline()); 
} while (map[i].length!=cols);
 
for (int i = 0; i < rows; i++)
   for (int j = 0; j < cols; j++)
        if (map[i][j] == wall) map[i][j] = ' ';
 
 
}
// for(int x =1; x <= cols; x++)
   // cout << x;
 
cin.ignore(); cin.ignore();
  return 0;
}
 

this is what I have so far but is keep giving me an error because of map size any idea why?

U are building array of strings and putting it on the stack:

string map[rows];

this is not correct,because rows is variable and stack can only support constant values,u need to allocate it dynamicly.

In c++ that is done with using new:

string *map/a pointer to a string called map

map=new map[rows] //allocating memory for map

now it can be used same way:

map[i],...

There are also more of the problems but we will diel with them later,first make sure to allocate memory for string map

Savage