Okai, so this is the program I have reached, it works perfectly. But there is one thing I need. I need to add a Y/N function. What I mean is I want for there to be a question to ask the user at the end of the program, 'Do you want to make an other calculation and for it to go from the beginning if I write Y and exit if I write N.

#include <stdio.h>

Code:int get_problem(void); double get_pt_slope(double *m, double *x1, double *y1); double get2_pt(double *x1,double *y1,double *x2,double *y2); double slope_intcpt_from2_pt(double x1,double y1,double x2,double y2,double *m, double *intercept); double intcpt_from_pt_slope(double m,double x1, double y1,double *intercept); double display2_pt(double x1,double y1,double x2,double y2); double display_pt_slope(double m,double x1,double y1); double display_slope_intcpt(double m, double intercept); int main() { int x; x=get_problem(); if (x==1) { double x1,y1,x2,y2,intercept,m; get2_pt(&x1,&y1,&x2,&y2); slope_intcpt_from2_pt(x1,y1,x2,y2,&m,&intercept); display2_pt(x1,y1,x2,y2); display_slope_intcpt(m,intercept); } if (x==2) { double m,x1,y1,intercept; get_pt_slope(&m,&x1,&y1); intcpt_from_pt_slope(m,x1,y1,&intercept); display_pt_slope(m,x1,y1); display_slope_intcpt(m,intercept); } return (0); } int get_problem(void) { int x; printf("Select the form that you would like to convert to slope-intercept form: \n 1) Two-point form (you know two points on the line) \n 2) Point =slope form (you know the line's slope and one point) \n =>"); scanf("%d",&x); return(x); } double get_pt_slope(double *m, double *x1, double *y1) { printf("Enter the slope =>"); scanf("%lf",&*m); printf("Enter the x-y coordinates of the point seperated by a space =>"); scanf("%lf%lf",&*x1,&*y1); } double get2_pt(double *x1,double *y1,double *x2,double *y2) { printf("Enter the x-y coordinates of the first point seperated by a space =>"); scanf("%lf%lf",&*x1,&*y1); printf("Enter the x-y coordinates of the second point seperated by a space =>"); scanf("%lf%lf",&*x2,&*y2); } double slope_intcpt_from2_pt(double x1,double y1,double x2,double y2,double *m, double *intercept) { *m=(y2-y1)/(x2-x1); *intercept=((*m*(-x1))+y1); } double intcpt_from_pt_slope(double m, double x1, double y1, double *intercept) { *intercept=(m*(-x1))+y1; } double display2_pt(double x1,double y1,double x2,double y2) { printf("Two Point Form \n ((%.2f-%.2f) \n m=-----------------\n (%2f-%2f))\n",y2,y1,x2,x1); } double display_pt_slope(double m,double x1,double y1) { printf("Point-Slope Form \n y-%.2f=%.2f(x-%.2f)\n",y1,m,x1); } double display_slope_intcpt(double m, double intercept) { printf("Slope-Intercept Form \n y=%.2fx+%.2f ",m,intercept); }

And basically we are using the C-free compiler, and this is extreme basics of the c programming. All we have took is shown to you here, with the addition of for loops and while loops.