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 a C Program without using graphics.

Program:

#include<stdio.h>
#include<conio.h>
#include<graphics.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();
}