task8.c

include<stdio.h>

include<math.h>

int main()

{

double s, a, b, c, area;

while (scanf_s("%lf%lf%lf", &a, &b, &c) != EOF)

{

s = (a + b + c) / 2;

area = sqrt(s * (s - a) * (s - b) * (s - c));

printf("a = %.3f b = %.3f c = %.3f s = %.3f, area = %.3f", a, b, c, s, area);

printf("\n");

}

return 0;

}