题解 | #计算三角形的周长和面积#

int main()
{
    int a,b,c;
    scanf ("%d %d %d",&a,&b,&c);
    float circumference =1.0*(a+b+c);
    float p = 1.0*circumference/2;
    float area =sqrt(p*(p-a)*(p-b)*(p-c));
    printf ("circumference=%.2f area=%.2f",circumference,area);
    return 0;
}