题解 | #计算三角形的周长和面积#

#include <stdio.h>
#include<math.h>
int main() {
    float a, b, c;
    scanf("%f%f%f",&a,&b,&c);
    float cir = a + b + c;
    float p = (a + b + c) * 0.5;
    float are = sqrt(p*(p-a)*(p-b)*(p-c));
    printf("circumference=%.2f area=%.2f",cir,are);
    return 0;
}