#include<stdio.h>
int main ()
{
  float p1_x = 0,p2_x = 0, p1_y =0, p2_y = 0;
  printf("Enter the x-coordinate of point 1: ");
  scanf("%f",&p1_x);
  printf("Enter the y-coordinate of point 1: ");
  scanf("%f",&p1_y);
  printf("Enter the x-coordinate of point 2: ");
  scanf("%f",&p2_x);
  printf("Enter the y-coordinate of point 2: ");
  scanf("%f",&p2_y);
  
  float slope = (p2_y - p1_y) / (p2_x - p1_x);  // No need to check for divide by zero case here- as it displays "inf" in case of infinity.
						// But, It is a good practice to check as the value might be used in later computations .
  printf(" The slope is : %f\n",slope);
  
}