C program to draw a line without using graphics

We already know that the general equation of a straight line is y = mx + c, where m is the slope of the line and c is the y-intercept. It is the most common form of the equation of a straight line that is mainly used in geometry. So, We use this straight line equation to draw a line in C Program without using graphics.

Program:

#include<iostream.h>
#include<conio.h>
#include<math.h>
using namespace std;
int pth (int x)  {
    return 2*x-3;
}
void main()  
{
    int i,j,y;
    for (int x=-10;x <= 10;x++)  
     {
        for ( i=-10;i <= x;i++)  
         {
            if (i==x) 
             {
                y=pth(x);
                cout<<"x=";
                cout<<x;
                cout<<"y=";
                cout<<y;

                for(j=-10;j<=y;j++) 
                {
                    if(j==y)
                        cout << "*";
                    else
                        cout << " ";
                 }
            }
        }
        cout << "\n";
    }
    cin.get();
    return 0;
getch();
 }