task8.c

include<stdio.h>

include<math.h>

int main()
{
int a, b, c;
float area, s;
scanf_s("%d %d %d", &a, &b, &c);
s = (a + b + c) / 2;
area = sqrt(s * (s - a) * (s - b) * (s - c));
printf("a=%d,b=%d,c=%d,area=%.3f", a, b, c, area);
}