题解 | 计算三角形的周长和面积
计算三角形的周长和面积
https://www.nowcoder.com/practice/109a44d649a142d483314e8a57e2c710
#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;
//海伦公式
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;
}
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