triangle help

[sugarflaps]

Hi im needing a wee bit of help creating a series of triangles that get bigger each time the user has to input the number of triangles they want. I have managed to get my code to produce one triange but i cant get the loop to run for the number of triangles. Any help would be great thanks guys

#include <iostream> // using the main library
using namespace std;
 
 
 
// Function declarations
 
char this_char () ;
int get_num_row () ;
void draw_tri ( char this_char, int num_row ) ;
 
int main ()
{
    char this_char = '*' ;
 
    //Get number of rows.
    int num_row ;
    num_row = get_num_row () ;
 
    // Draw triangles
    draw_tri ( this_char, num_row ) ;
 
    return 0 ;
 
}
 
 
// Function to get number of rows.
 int get_num_row ()
{
    int num_row ;
    cout << " Please enter the number of rows you would like in your triangle. " << endl ;
    cin >> num_row ;
 
    return num_row ;
 
}
 
// Function to draw triangles.
void draw_tri (char this_char, int num_row ) 
{
    for ( int i = 1 ; i <= num_row ; i ++ )
    {                     // Nested loop.
        for ( int j = 1 ; j <= i ; j ++ )
        {
            cout << " * " ;
 
        }
        cout << endl << endl ;
 
    }
}

[amitpatel66]

Hi im needing a wee bit of help creating a series of triangles that get bigger each time the user has to input the number of triangles they want. I have managed to get my code to produce one triange but i cant get the loop to run for the number of triangles. Any help would be great thanks guys

#include <iostream> // using the main library
using namespace std;
 
 
 
// Function declarations
 
char this_char () ;
int get_num_row () ;
void draw_tri ( char this_char, int num_row ) ;
 
int main ()
{
    char this_char = '*' ;
 
    //Get number of rows.
    int num_row ;
    num_row = get_num_row () ;
 
    // Draw triangles
    draw_tri ( this_char, num_row ) ;
 
    return 0 ;
 
}
 
 
// Function to get number of rows.
 int get_num_row ()
{
    int num_row ;
    cout << " Please enter the number of rows you would like in your triangle. " << endl ;
    cin >> num_row ;
 
    return num_row ;
 
}
 
// Function to draw triangles.
void draw_tri (char this_char, int num_row ) 
{
    for ( int i = 1 ; i <= num_row ; i ++ )
    {                     // Nested loop.
        for ( int j = 1 ; j <= i ; j ++ )
        {
            cout << " * " ;
 
        }
        cout << endl << endl ;
 
    }
}

Hi,

get the input from the user the no of triangles he want to draw, then run a for loop using that value from 1...9( say user wants to draw 9 triangles) and with in the loop call draw_tri function one time each for every value of for loop. so the draw_tri function will be called 9 times here!!
Is that simple??

[sugarflaps]

Hi,

get the input from the user the no of triangles he want to draw, then run a for loop using that value from 1...9( say user wants to draw 9 triangles) and with in the loop call draw_tri function one time each for every value of for loop. so the draw_tri function will be called 9 times here!!
Is that simple??

Hi im not quite sure what you mean do i get rid of rows and just go with thenumber of triangles. thanks

[amitpatel66]

Hi im not quite sure what you mean do i get rid of rows and just go with thenumber of triangles. thanks

No. I mean you get two input values from the user:
1. No of rows required.
2. No of triangle

Call draw_tri functrion passing no of rows as input to that function as you are doing that much no of times as mentioned by user.

Eg:
sample code snippet:

cout<< "Enter no of rows required:";
cin>>b;
cout<< "Enter total no of triangles required:";
cin >> a;
for(int i=1;i<=a;i++)
{
 draw_tri(b);
}
 

Hope this helps!!

[sugarflaps]

hi is this what you mean i keep getting this error message error C2660: 'draw_tri' : function does not take 1 arguments
here i my ammended code

#include <iostream> // using the main library
using namespace std;
 
 
 
// Function declarations
 
char this_char () ;
int get_num_tri () ;
int get_num_row () ;
void draw_tri ( int num_tri, int num_row ) ;
 
int main ()
{
 
    // Get number of triangles
    int num_tri ;
    num_tri = get_num_tri () ;
 
    // Get number of rows
    int num_row ;
    num_row = get_num_row () ;
 
    // Draw triangles
    draw_tri ( num_tri, num_row ) ;
 
    return 0 ;
 
}
 
// Funtion to get user to input number of triangles and rows.
int get_num_tri ()
{
    int num_tri ;
    int num_row ;
    cout << " Please enter the number of triangles you would like " << endl ;
    cin >> num_tri ;
    cout << " Please enter the number of rows you would like " << endl ;
    cin >> num_row ;
    return num_tri ;
    return num_row ;
}
 
 
 
// Function to draw triangles.
void draw_tri ( int num_tri, int num_row ) 
{
    for ( int i = 1 ; i <= num_tri ; i ++ )
    {
     draw_tri (num_row) ;
    for (int j = 1 ; j <= num_row ; j ++ )   
        {
            cout << " * " ;
 
        }
        cout << endl << endl ;
    }
 
 
}

[amitpatel66]

Hi im needing a wee bit of help creating a series of triangles that get bigger each time the user has to input the number of triangles they want. I have managed to get my code to produce one triange but i cant get the loop to run for the number of triangles. Any help would be great thanks guys

#include <iostream> // using the main library
using namespace std;
 
 
 
// Function declarations
 
char this_char () ;
int get_num_row () ;
void draw_tri ( char this_char, int num_row ) ;
 
int main ()
{
    char this_char = '*' ;
 
    //Get number of rows.
    int num_row ;
    num_row = get_num_row () ;
 
    // Draw triangles
    draw_tri ( this_char, num_row ) ;
 
    return 0 ;
 
}
 
 
// Function to get number of rows.
 int get_num_row ()
{
    int num_row ;
    cout << " Please enter the number of rows you would like in your triangle. " << endl ;
    cin >> num_row ;
 
    return num_row ;
 
}
 
// Function to draw triangles.
void draw_tri (char this_char, int num_row ) 
{
    for ( int i = 1 ; i <= num_row ; i ++ )
    {                     // Nested loop.
        for ( int j = 1 ; j <= i ; j ++ )
        {
            cout << " * " ;
 
        }
        cout << endl << endl ;
 
    }
}

DO NOT modify the code that you have written for generating one triangle.Just modify the MAIN function. I have made the changes as shown below. USe this main function for your program:

int main ()
{
    char this_char = '*' ;
    int no_of_tri = 1;
 
    //Get number of rows.
    int num_row ;
    num_row = get_num_row () ;
 
   //Get no of triangles required
  cout<< "Enter no of triangles required:";
  cin >> no_of_tri;
 
    // Draw triangles
    for(int i=1;i<=no_of_tri;i++)
   {
    draw_tri ( this_char, num_row ) ;
   }
 
    return 0 ;
}