Program In C Language for Circle Through Three Points

#include < stdio.h>

#include < math.h>

#include < conio.h>

int main()

{

clrscr();

double f,g,m,x1,x2,x3,y1,y2,y3;

double c,d,h,e,k,r,s;

for(;;)

{

if(scanf("%lf %lf %lf %lf %lf %lf",&x1,&y1,&x2,&y2,&x3,&y3)==EOF)

//checking for input

break;

f = x3*x3-x3*x2-x1*x3+x1*x2+y3*y3-y3*y2-y1*y3+y1*y2; //formula

g = x3*y1-x3*y2+x1*y2-x1*y3+x2*y3-x2*y1;

if(g==0)

m = 0;

else

m = (f/g);

c = (m*y2)-x2-x1-(m*y1); //formula

d = (m*x1)-y1-y2-(x2*m);

e = (x1*x2)+(y1*y2)-(m*x1*y2)+(m*x2*y1);

h = (c/2); //formula

k = (d/2);

s = (((h)*(h))+((k)*(k))-e);

r = pow(s,.5);

printf("(x");

if(h>=0)

printf(" + ");

else if(h< 0)

printf(" - ");

if(h< 0)

h=-h;

printf("%.3lf)^2",(h));

printf(" + ");

printf("(y");

if(k>=0)

printf(" + ");

else if(k< 0)

printf(" - ");

if(k< 0)

k=-k;

printf("%.3lf)^2 = %.3lf^2",(k),r);

printf("");

printf("x^2 + y^2");

if(c>=0) printf(" + ");

else if(c< 0) printf(" - ");

if(c< 0) c=-c;

printf("%.3lfx",c);

if(d>=0) printf(" + ");

else if(d< 0) printf(" - ");

if(d< 0) d=-d;

printf("%.3lfy",d);

if(e>=0) printf(" + ");

else if(e< 0) printf(" - ");

if(e< 0) e=-e;

printf("%.3lf = 0",e);

printf("");

}

getch();

return 0;

}

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## 6 comments:

thanksssssssssssssssssssssssssssssssssssssss

2thankssssssssssssss1411

2thankssssssssssssss

How can i build it , lets say, in codeblocks, do i need to create classes/files??

How can i compile this on Codeblocks? do i need to create second files since this one is the main?

thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:D!!!!!

works great! butn I have to comment the clrscr(); but it's fine :D jejejej

thanks!!!!!!!!!!!!!!!!!!

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