这是一道C语言题，想用Ｃ＋＋的类和对象修改，求三角形面积和周长，怎么修改啊？初学者，没什么头绪
#include<stdio.h>
#include<math.h>
int main(void)
{
    double area,perimeter,s,a,b,c;
    printf("Enter a b c:");
    scanf("%lf%lf%lf",&a,&b,&c);
    if((a+b>c)||(a+c>b)||(b+c>a)){
        s=(a+b+c)/2;
        area=sqrt(s*(s-a)*(s-b)*(s-c));
        perimeter=a+b+c;
        printf("area=%.2f,perimeter=%.2f\n",area,perimeter);
    }
    else{
        printf("These sides do not corrspond to a vaild triangle\n");
    }
    return 0;
}