Thread: Adding a yes or no (Y/N) function

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.

Oooh, so i make a function that behaves like a loop that only goes out if N was put, and go around in the loop if I press Y. And I should make all of the MAIN program inside this function is what you are saying?

So does the function go like char x; printf "do you want to do an other conversion"; then scanf "%c",'x' then if x==N | x==n then exit the program and if x==Y | x==y then repeat the program?

I know how to do that but my program is in a big scale. So I kind of get confused