题解 | #计算三角形的周长和面积#

#include<stdio.h>
#include<math.h>
#define pi 3.1415926
int main(){
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    float circumference = a+b+c;
    float d = circumference/2.0;
    float area = sqrt(d*(d-a)*(d-b)*(d-c));
    printf("circumference=%.2f area=%.2f",circumference,area);
    return 0;
}