题解 | #计算三角形的周长和面积#

C语言代码求三角形周长和面积

#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;
    //double x = pi/3;
    //float area = a*b*sin(x)/2;
    //这还得必须用海伦公式解决，三角函数不方便
    float d = circumference/2.0;
    float area = sqrt(d*(d-a)*(d-b)*(d-c));//sqrt开平方
    printf("circumference=%.2f area=%.2f",circumference,area);
    return 0;
    
}