题解 | #计算三角形的周长和面积#

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