how to do this in array?..

[manyeahkiss]

The problem is to make this a triangle using array, i already made a triangle using only for loop but i don't know how to do this in array..

here is the code :

#include<stdio.h>
#include<conio.h>

#define tri 10

main()
{
      int x,y,z;
      
      for(x=tri;x>0;x--)
      {
           printf("\t");
                            for(y=(tri-x);y>0;y--)
                            {
                                                 
                                                 printf(" ");
                                                  }
                                                 for(z=x;z>0;z--)
                                                  {
                                                                  printf("*");
                                                                  printf(" ");
                                                                  }
           printf("\n");
           
           }
           
           getch();
           }

can anyone give me an idea on how to do this using array?.. please help me.. thank you!!..

[cbeginplusplus]

this should set up your array what you would need to do is replace your current code by say giving the value 1 to all triangle points and 0 to all spaces. Then you would need to print out the array.
basically the array is triangle[10][10]; You could use strings instead of doubles if you want to directly print out the array.

	int i,j;
	double **triangle;
	triangle = new double*[tri];
	for(i = 0; i <= tri; i++)
	{
		triangle[i] = new double[tri];
	}
	i = 0;
	j = 0;

[alexanderswang]

You mean this?

#define tri 10

int main()
{
    int xx[2*tri-1][2*tri-1]={0};
    for(int i=0;i<10;i++)
    {
        for(int j=i;j<=2*tri-j-2;j+=2)
        {
            xx[i][j]=1;
            xx[i][2*tri-j-2]=1;
        }
    }
    for(int i=0;i<tri;i++)
    {
        for(int j=0;j<2*tri-1;j++)
        {
            std::cout<<xx[i][j];
        }
        printf("\n");
    }
    std::cin.get();
    return 0;
}

[cbeginplusplus]

Not quite, but without answering your problem completely, here's what the input into the array should look like based off your code:

	int x,y,z;
	int i,j;
	string **triangle;
	triangle = new string*[tri];
	for(i = 0; i <= tri; i++)
	{
		triangle[i] = new string[tri];
	}
	i = 0;
	j = 0;
     for(x=tri;x>0;x--)
     {
	for(y=(tri-x);y>0;y--)
	{                 
		triangle[i][j] = " ";
		j++;
	}
        for(z=x;z>0;z--)
        {
		triangle[i][j] = "* ";
		j++;
        }
		i++;
		j=0;
      }