Racine carrée en C

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
double plop;
double pouet;

plop = 36;
pouet = sqrt(plop);
printf("La racine carrée de %f est %f", plop, pouet);
return (0);
}

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
    double bc =0;
    double ab =0;
    double ac =0;
    printf("Soit un triangle rectangle ABC.\n");
    printf ("Rentrez un nombre pour AB :\n");
    scanf ("%lf", &ab);
    printf ("AB = %lf \n", ab);
    printf ("Rentrez un nombre pour AC :\n");
    scanf ("%lf", &ac);
    printf ("AC = %lf \n", ac);
    bc = (ab*ab)+(ac*ac);
    bc = sqrt (bc);
    printf ("BC = %lf \n", bc);


    return 0;
}

 bc = (ab*ab)+(ac*ac);
    bc = sqrt (bc);

 bc = sqrt((ab*ab)+(ac*ac));

bc = sqrt ((ab*ab)+(ac*ac));

bc = sqrt ((ab+ac)*2);